New Mineral Names

In this issue

This New Mineral Names has entries for 13 new minerals, including alumovesuvianite, canosioite, currierite, cyprine, dagenaisite, dravertite, ferrorhodonite, fogoite-(Y), manganiceladonite, puninite, wampenite, zincoberaunite, zincostrunzite, and new data on alumoklyuchevskite and kamchatkite.

Alumovesuvianite

T.L. Panikorovskii, N.V Chukanov, S.M. Aksenov, A.S. Mazur, E.Yu. Avdontseva, V.V. Shilovskikh, and S.V. Krivovichev (2017) Alumovesuvianite, Ca₁₉Al(Al,Mg)₁₂Si₁₈O₆₉(OH)₉, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada. Mineralogy and Petrology, 111(6), 833–842.Panikorovskii T.L., Chukanov N.V., Aksenov S.M., Mazur A.S., Avdontseva E.Yu., Shilovskikh V.V., Krivovichev S.V. , 2017"Alumovesuvianite, Ca₁₉Al(Al,Mg)₁₂Si₁₈O₆₉(OH)₉, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada" Mineralogy and Petrology, vol. 111, no. 6, p. 833–842.

Alumovesuvianite (IMA 2016-014), ideally Ca₁₉Al(Al,Mg)₁₂ Si₁₈O₆₉(OH)₉, is a new vesuvianite-group member (with Al dominant at the at the Y1 site) discovered in the rodingites at the contact of a gabbroid rock with host serpentinite in the abandoned Jeffrey mine, Asbestos, Estrie Region, Québec, Canada. Associated minerals are diopside, grossular, and prehnite. Alumovesuvianite forms colorless to light pink transparent, vitreous prismatic tetragonal crystals up to 4 × 4 × 6 mm encrusting walls of cavities in a granular diopside. The dominant crystal forms are {100}, {110}, {210}, {111}, {101}, and {001}; sometimes {112} and/or {221}. Crystals are elongated parallel to [001] with striations at the same direction. Cleavage was not observed. The Mohs hardness is 6.5. D_meas = 3.31(1), D_calc = 3.36 g/cm³. In plane-polarized light alumovesuvianite is colorless non-pleochroic. It is optically uniaxial (–), ω = 1.725(2), ε = 1.722(2) (white light). The TGA and DSC study was performed by heating up to 1100 °C. The single endothermic effect at 1035 °C is assigned to the dehydroxylation. Total weight loss 2.61% is in good agreement with the calculated H₂O content of 2.82%. The ²⁷Al MAS NMR spectrum exhibits two main peaks: strong at 7.96 ppm (assigned to an octahedrally coordinated Al at the Y2 and Y3 sites) and a weak at 39.15 ppm (Al in Y1 site). The IR spectrum was obtained in the range 360–3800 cm^–1. The bands (cm^–1) are: 3671, 3632, 3527, 3407, 3212, and 3051 (O–H-stretching vibrations of differently coordinated OH^–groups); 1890 weak (overtone or combination mode of Si–O-stretching); strong bands at 1070–860 (Si–O-stretching as well as Si–O–Si and O– Si–O bending vibrations, partly combined with stretching vibrations of Y-centered polyhedra (below 630 cm^–1); 810–690 (bending vibrations of OH^– groups. The absence of absorption bands in the range 1100–1500 cm^–1 indicates the absence of boron-bearing groups. The average of electron probe WDS analysis (number not given) is [wt% (range)]: SiO₂ 37.08 (36.22–37.68), Al₂O₃ 18.82 (18.72–19.29), CaO 36.57 (34.99–37.07), MgO 2.48 (1.60–2.84), Mn₂O₃ 0.67 (0.37–0.86), Fe₂O₃ 0.22 (0–0.80), H₂O (by TGA) 2.61, total 98.45. The empirical formula calculated on the basis of 19 Ca apfu assuming trivalent Mn and Fe for stoichiometry and considering the MAS-NMR data, is: Ca_19.00(Al_0.92Fe0.083+)_Σ1.00(Al_9.83Mg_1.80Mn0.253+)_Σ11.88Si_17.98O_69.16(OH)_8.44. The strongest lines in the X-ray powder-diffraction pattern [d Å(I%; hkl)] are: 2.96 (22; 004), 2.761 (l00; 432), 2.612 (61; 224), 2.593 (25; 600), 1.7658 (20; 831), 1.6672 (20; 734), 1.6247 (21; 912), 1.3443 (22; 880). The unit-cell parameters refined from the powder data are a = 15.5603(5) Å, c = 11.8467(4) Å, V= 2868.3 ų. The single-crystal X-ray diffraction data refined to R₁ = 0.036 for 3098 unique observed |F_o| ≥ 4 σ_F reflections shows alumovesuvianite is tetragonal, space group P4/n, Z = 2; a = 15.5103(2) Å, c = 11.8096(2) Å, and V = 2841.05 ų. The general crystal-chemical formula of vesuvianite-group minerals (Z = 2) is: X₁₆X1₂X4Y1Y2₄Y3₈T_0–5[(ZO₄)_10–x(H₄O₄)_x](Z₂O₇)₄(W)_10–12 (x < 3), where X are sevenfold- to ninefold-coordinated sites occupied by Ca and subordinate Na, K, Fe²⁺, and REE. Sites X1 and X4 (Ca, Na) are in a square antiprism coordination; Y1 (Fe³⁺, Mg, Al, Fe²⁺, Cu²⁺) is in a square pyramidal coordination; Y2 and Y3 (Al, Mg, Zn, Fe²⁺, Fe³⁺, Mn²⁺, Mn³⁺, Ti, Cr) have octahedral coordination; T (B, Fe, Al) is the additional site with a triangular and/or tetrahedral coordination; ZO₄ and Z₂O₇ are ortho- and ditorthosilicate groups, respectively, and W = OH or O, F, Cl. Alumovesuvianite is a new member of the vesuvianite group with Al³⁺as a dominant cation in the Y1 site. That fact is highlighted in its name. The type specimens are deposited in the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia. D.B.

Canosioite

F. Cámara, E. Bittarello, M.E. Ciriotti, F. Nestola, F. Radica, F. Massimi, C. Balestra, and R. Bracco (2017) As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: III. Canosioite, Ba₂Fe³⁺(AsO4)₂(OH), description and crystal structure. Mineralogical Magazine, 81(2), 305–317.Cámara F., Bittarello E., Ciriotti M.E., Nestola F., Radica F., Massimi F., Balestra C., Bracco R. , 2017"As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: III. Canosioite, Ba₂Fe³⁺(AsO4)₂(OH), description and crystal structure" Mineralogical Magazine, vol. 81, no. 2, p. 305–317.

Canosioite (IMA 2015-030), ideally Ba₂Fe³+(AsO₄)₂(OH), is a new mineral from the Maira Valley, Cuneo Province, Piedmont, Italy. The new mineral was found in the dump of the Valletta mine which consists of dispersed quartzites with quartz veins that contain a large variety of mineral phases rich in arsenic, vanadium, barium, and strontium. Canosioite probably originates from the reaction between ore minerals and hydrothermal fluids. Associated minerals are baryte, colorless to brownish aegirine, calcite, hematite, bronze Mn-bearing muscovite, unidentified Mn oxides, and unidentified Mn arsenates. Only two small specimens (each around 2.5 mm × 1 mm × 1 mm) with glassy opaque reddish-brown subhedral crystals of canosioite were found. Crystals are translucent with a pale-yellow streak and vitreous luster, are brittle, and show no cleavage or parting. No twinning was observed. Hardness measured by nanoindentation corresponds to 6–6½ of Mohs scale. Density was not measured due to small crystal size; D_calc = 4.943 g/cm³. Canosioite is optically biaxial (+) with 2V_meas = 84(2)°. The refractive indexes were not measured; n_calc = 1.9. Canosioite is weakly pleochroic with X = brownish yellow < Y = brown < Z = reddish brown. It does not fluoresce under short- or long-wave UV light. The Raman spectrum shows bands (cm^–1) at 133, 147, 163, and 187 (M–O and lattice modes); 234, 282, and 368 (As⁵⁺–O bending vibrations); 326 (probably V–O bending vibrations); 457 and 507 (component bands for As–O) and 478 (the same for As–O and V–O); 820 (shoulder probably related to the VO₄ symmetric stretching mode), intense peaks at 838, 862, and 896 [probably (AsO4)^3– stretching mode]. No bands are observed in the range 2500–4000 cm^–1 in the Raman spectrum. However the FTIR spectrum shows a large convoluted absorption peak centered at ~3150 cm^–1 and the absence of any discernible clear absorption at ~1650 cm^–1. This confirms the presence of hydrogen as hydroxyl groups but not the presence of H₂O as reported for arsenbrackebuschite. The FTIR spectrum also shows bands at ~850 cm^–1, with a weak shoulder at ~790 cm^–1. The average of four electron probe WDS analyses [wt% (range)] is: Na₂O 0.06 (0.00–0.12), MgO 0.43 (0.35–0.56), CaO 0.02 (0.00–0.03), NiO 0.02 (0.00–0.05), CuO 0.03 (0.00–0.08), SrO 0.42 (0.26–0.77), BaO 49.36 (48.86–50.27), PbO 1.69 (1.47–2.02), Al₂O₃ 1.25 (1.23–1.27), Mn₂O₃ 3.89 (3.65–4.19), Fe₂O₃ 6.95 (6.60–7.18), Sb₂O₃ 0.01 (0.00–0.04), SiO₂ 0.03 (0.01–0.06), P₂O₅ 0.02 (0.00–0.08), V₂O₅ 10.88 (8.80–9.48), As₂O₅ 24.64 (24.06–25.34), SO₃ 0.01 (0.00–0.04), F 0.02 (0.00–0.09), H₂O (calculated based on OH+F+H₂O = 1) 1.61 (1.58–1.68), O=F –0.01 (0–0.04), total 101.34. The empirical formula (Ba_1.92Pb_0.05Sr_0.02Na_0.01)_Σ2.00(Fe0.523+Mn0.293+ Al_0.15Mg_0.06)_Σ1.02[(As_0.64V_0.36)_Σ1.00O₄]₂[(OH_0.92F_0.01)(H₂O)_0.07] based on 9 O apfu. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 3.713 (18; 111), 3.304 (100; 21l), 3.058 (31; 020), 3.047 (59; 103), 2.801 (73; 112), 2.337 (24; 220), 2.158 (24; 123). The unit-cell parameters refined from powder-diffraction data are: a = 7.871(3), b = 6.117(2), c = 9.158(5) Å, β = 112.80(3)°, and V = 405.9 A³. Single-crystal X-ray diffraction data collected on a crystal of size 0.1 × 0.05 × 0.06 mm refined to R₁ = 0.026 for 1245 I ≥ 4σ(I) unique reflections shows canosioite is monoclinic, P2₁/m, a = 7.8642(4), b = 6.1083(3), c = 9.1670(5) Å, β = 112.874(6)°, V = 405.73 ų, and Z = 2. Canosioite belongs to the brackebuschite supergroup and is isostructural to arsenbrackebuschite. The structure consists of chains of [M³⁺,²⁺(T⁵⁺O₄)₂X] units connected through interstitial divalent cations. Canosioite is named for its type locality, the small municipality of Canosio where the Valletta mine, is situated. The holotype material is deposited in the Museo Regionale di Scienze Naturali di Torino, Sezione di Mineralogia, Petrografia e Geologia, Torino, Italy. O.C.G.

Currierite

A.R. Kampf, S.J. Mills, B.P. Nash, M. Dini, and A.A. Molina Donoso (2017) Currierite, Na₄Ca₃MgAl₄(AsO₃OH)₁₂·9H₂O, a new acid arsenate with ferrinatrite-like heteropolyhedral chains from the Torrecillas mine, Iquique Province, Chile. Mineralogical Magazine, 81(5), 1141–1149.Kampf A.R., Mills S.J., Nash B.P., Dini M., Molina Donoso A.A. , 2017"Currierite, Na₄Ca₃MgAl₄(AsO₃OH)₁₂·9H₂O, a new acid arsenate with ferrinatrite-like heteropolyhedral chains from the Torrecillas mine, Iquique Province, Chile" Mineralogical Magazine, vol. 81, no. 5, p. 1141–1149.

Currierite (IMA 2016-030), ideally Na₄Ca₃MgAl₄(AsO₃OH)₁₂·9H₂O, is a new mineral discovered at the Torrecillas mine, Salar Grande, Iquique Province, Tarapacá Region, Atacama Desert, Chile (~20°58 ′13″S, 70°8′17″W). Currierite is the seventh new arsenate recently described from that location. The Torrecillas deposit, in which the new mineral is found, consists of two main veins rich in secondary arsenic and copper minerals that intersect metamorphosed marine shales and lavas and related to andesites and porphyritic lavas of the Jurassic La Negra Formation. Currierite occurs as a secondary alteration phase in association with anhydrite, canutite, chudobaite, halite, lavendulan, magnesiokoritnigite, quartz, scorodite, and torrecillasite. That assemblage resulted from the oxidation of native arsenic and other As-bearing primary phases, followed by later alteration by saline fluids derived from evaporating meteoric water under hyperarid conditions. Currierite forms hexagonal prisms, needles and hair-like fibers up to ~200 μm long, in sprays. The crystal faces are {100} and {001}. Crystals are transparent, with vitreous to silky luster and white streak. The mineral has at least one good cleavage parallel [001] and an irregular fracture. No twinning was observed. Currierite is brittle, but elastic in very thin fibers. The Mohs hardness is ~2. D_meas = 3.08(2) and D_calc = 3.005 g/cm³. The mineral is slowly soluble in dilute HCl at room temperature. Currierite is optically, uniaxial (–), ω = 1.614, and ε = 1.613 (white light), non-pleochroic. The average of five electron probe WDS analysis [wt% (range)] is: K₂O 0.17 (0.14–0.20), Na₂O 5.65 (5.16–6.39), CaO 7.10 (6.76–7.54), MgO 2.39 (2.35–2.44), CoO 0.09 (0.04–0.16), CuO 0.47 (0.36–0.58), Fe₂O₃ 2.32 (2.13–2.74), Al₂O₃ 6.97 (6.70–7.57), Sb₂O₅ 2.42 (1.96–3.01), As₂O₅ 62.03 (59.69–64.19), Cl 0.07 (0.05–0.12), H₂O (calculated by charge balance, As + Sb = 12 and O + Cl = 57 apfu) 12.82, –O=Cl₂ 0.02, total 102.48. The high analytical total is attributed to partial dehydration under vacuum. The empirical formula based on As + Sb = 12 and O + Cl = 57 apfu is (Na_3.95Al_2.96Ca_2.74Mg_1.28Fe0.633+ Cu_0.13K_0.08 Co_0.03)_Σ11.80(As11.685+Sb0.325+)_Σ12(O_56.96Cl_0.04)_Σ57H_30.81. The strongest lines in the X-ray powder diffraction pattern [d Å (I%; hkl)] are: 10.63 (100; 100), 6.12 (20; 110), 5.30 (15; 200), 4.61 (24; 002), 4.002 (35; 210), 3.474 (29; 202), 3.021 (96; 212), 1.5227 (29; 440,334,612). Unit-cell parameters refined from the powder data with whole pattern fitting are a = 12.1997(10), c = 9.2019(7) Å, and V = 1186.7 ų. Unit-cell parameters obtained from a single crystal X-ray study are: a = 12.2057(9), c = 9.2052(7) Å, V = 1187.7 ų. Currierite is hexagonal, P622, Z = 1. The crystal structure of currierite was solved and refined to R₁ = 0.0226 for 658 F_o > 4σF reflections. It is based upon a heteropolyhedral chain (identical to that in kaatialaite and a geometrical isomer of that in ferrinatrite) along c in which AlO₆ octahedra are triple-linked by sharing corners with AsO₃OH tetrahedra. Chains are linked to one another by eightfold-coordinated Na and Ca polyhedra forming a three-dimensional framework with large cavities occupied by rotationally disordered Mg(H₂O)₆ octahedra. The mineral is named in honor of Rock Henry Currier (1940–2015), American mineral collector, dealer, traveler, lecturer, one of Mindat’s most dedicated and productive managers. He donated his extensive, one of the world best systematic species collection, to the RRUFF Project. He was always generous in unrelenting effort to benefit the greater mineralogical community. The description is based on one holotype and two cotype specimens that are deposited in the Natural History Museum of Los Angeles County, Los Angeles, California, U.S.A., with catalogue numbers 66266 (holotype), 64057 (cotype; also the holotype for magnesiokoritnigite) and 64080 (cotype; also a cotype for torrecillasite). D.B.

Cyprine

T.L. Panikorovskii, V.V. Shilovskikh, E.Yu. Avdontseva, A.A. Zolotarev, I.V. Pekov, S.N. Britvin, U. Hålenius, and S.V. Krivovichev (2017) Cyprine, Ca₁₉Cu²⁺(Al,Mg,Mn)₁₂Si₁₈O₆₉(OH)₉, a new vesuvianite-group mineral from the Wessels mine, South Africa. European Journal of Mineralogy, 29(2), 295–306.Panikorovskii T.L., Shilovskikh V.V., Avdontseva E.Yu., Zolotarev A.A., Pekov I.V., Britvin S.N., Hålenius U., Krivovichev S.V. , 2017"Cyprine, Ca₁₉Cu²⁺(Al,Mg,Mn)₁₂Si₁₈O₆₉(OH)₉, a new vesuvianite-group mineral from the Wessels mine, South Africa" European Journal of Mineralogy, vol. 29, no. 2, p. 295–306.

Cyprine (IMA 2015-044), Ca₁₉Cu²⁺(Al,Mg,Mn)₁₂Si₁₈O₆₉(OH)₉, is a new mineral found at the Wessels mine near Hotazel, Kalahari Manganese Field, North Cape province, South Africa. Cyprine is found in association with calcite, apatite, andradite, henritermierite and rhodochrosite. An assemblage containing cyprine and associated Mn- and Ca-bearing minerals was formed as a result of the hydrothermal activity with the main event that led to enrichment of the Mn ore dated at 1048 ± 5.9 Ma. Cyprine occurs in open cavities or are embedded in a coarse-grained colorless calcite. It forms chaotic aggregates up to 5 cm across of prismatic crystals up to 1 cm long and 3 mm thick. Crystals are well-formed, but typically show growth-related distortion. The dominant form is {100} and a minor is {110}, both commonly with striations along [001]. Crystals are terminated by the {331} faces. No twinning was observed. Cyprine is dark red with lilac hue, vitreous, and shows no cleavage. The Mohs hardness is 6.5. D_meas = 3.40(3) and D_calc = 3.41 g/cm³. The mineral is optically uniaxial (–), ω = 1.744 (2), ε = 1.732(2) (white light). It is strongly pleochroic, ranging from O = dark purple to dark reddish brown ≫ E = pale red to pale yellowish brown. The main absorption bands of the IR spectrum (cm⁻¹) are 443 (v₂ symmetric bending vibrations of the Si–O bonds); 490 ([Me–O]₆ vibrations); 574, 604, and 671 (v₄ asymmetric bending vibrations of the Si–O bonds); 814, 905, 972, and 1015 (asymmetric stretching vibrations of the Si–O and Si–O–Si bonds); 3354, 3640 (O–H stretching vibrations). The polarized optical absorption spectra have two strong absorption bands at 415 and 555 nm and a less intense band at 645 nm. Thermogravimetry and differential scanning calorimetry experiments show an endothermic effect at 1018 °C assigned to the dehydroxylation. Two endothermic peaks at 850–900 and 972 °C may correspond to the disappearance of (H₄O₄)⁴⁻ groups. Total weight loss is 3.30% (theoretical H₂O content is 3.10%). The average of 6/3 electron probe WDS analyses on two chemically different zones [wt% (range)] are: SiO₂ 36.98 (36.85–37.22)/36.51 (36.44–36.56), Al₂O₃, 14.98 (14.31–15.83)/13.70 (13.63–13.73), CaO 36.70 (36.48–36.82)/36.18 (36.09–36.28), MgO 3.24 (3.11–3.57)/1.10 (0.94–1.25), Mn₂O₃ 2.27 (1.56–2.82)/6.04 (5.85–6.22), CuO 2.39 (1.89–2.76)/1.86 (1.77–1.96), Fe₂O₃ 0.62 (0.34–0.83)/2.50 (2.13–2.84), Cr₂O₃ 0.23 (0.16–0.33)/0.04 (0.02–0.05), H₂O 3.30/3.30, total 100.71 (100.20–101.20)/101.23 (101.05–101.28). The H₂O content was determined by thermogravimetric analysis. The empirical crystal-chemical formulae calculated on the basis 19 Ca apfu with consideration of FTIR, TGA/differential scanning calorimetry, SREF, and optical spectra data are: Ca_8.00Ca_1.00(Cu_0.95Mg_0.05)_∑1.00Al_4.00(Al_5.50Mg_1.00Mn1.193+Fe0.223+Cr_0.09)_∑8.00([SiO₄]_9.91[H₄O₄]_0.09)_∑10.00[Si₂O₇]₄[(OH)₉O]_∑10.00 and Ca_18.00Ca_1.00(Cu_0.90Mg_0.10)_∑1.00(Al_3.22Mn0.603+Fe0.183+)_∑4.00(Al_4.72Mn1.203+Fe0.063+Mn0.602+Mg_0.40Cr_0.02)_∑8.00([SiO₄]_9.91[H₄O₄]_0.09)_∑10.00[Si₂O₇]₄[(OH)₉O]_∑10.00 for zone 1 and zone 2, respectively. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 5.89 (12; 002), 3.007 (12; 431), 2.950 (47; 004), 2.75 (100; 432), 2.594 (76; 522), 2.459 (35; 620), 2.324 (10; 144), 1.6224 (28; 672). The unit-cell parameters refined from powder-diffraction data are: a = 15.5652(5), c = 11.7921(4) Å, V = 2863.2 ų. Single-crystal X-ray diffraction data collected on a crystal of zone 1/zone 2 of size 0.15 × 0.14 × 0.12/0.07 × 0.07 × 0.05 mm refined to R₁ = 0.034/0.035 for 2848/2071 unique reflections with I ≥ 4σ(I) shows cyprine is tetragonal, space group P4/n, with a = 15.5173(4) and c = 11.8230(5) Å for zone 1, and a = 15.5699(4) and c = 11.8042(2) Å for zone 2. Cyprine is as a member of the vesuvianite group, with Cu²⁺ as a dominant cation in the Y1 site. “Cyprine” (derived from Latin cuprum, copper) was the name given by J.J. Berzelius in 1821 to describe Cu-bearing vesuvianite and is transferred to the new mineral. The holotype specimen is deposited at the Mineralogical Museum of the Department of Mineralogy, St. Petersburg State University, St. Petersburg, Russia. O.C.G.

Dagenaisite

A.R. Kampf, R.M. Housley, and J. Marthy (2017) Dagenaisite, a new zinc tellurate from the Gold Chain mine.Tintic, Utah, U.S.A. Canadian Mineralogist, 55(5), 867–873.Kampf A.R., Housley R.M., Marthy J. , 2017"Dagenaisite, a new zinc tellurate from the Gold Chain mine.Tintic, Utah, U.S.A" Canadian Mineralogist, vol. 55, no. 5, p. 867–873.

Dagenaisite (IMA 2017-017), ideally Zn₃Te⁶⁺O₆, is a new mineral discovered underground from the 300 foot level of the Opohonga stope at the Gold Chain mine, Tintic district, Juab County, Utah, U.S.A. (39°55′44″N 112°6′50″W). The location is in about 2 km SSE of the Centennial Eureka mine famous for discovery of the new Te minerals. The Gold Chain mine exploited a polymetallic (Au-Ag-Cu-Pb-Zn) vein deposit emplaced in dolomite. The upper portion of the deposit is almost completely oxidized. Dagenaisite is a late-stage secondary phase formed by the oxidative alteration of earlier Te- and Zn-bearing minerals, probably hessite and sphalerite. It is associated with cinnabar, dugganite, eurekadumpite, and gold in vugs in a quartz–dolomite matrix with embedded altered remnants, probably of hessite. Other associated minerals include adamite, arseniosiderite, atelestite, baryte, beudantite, conichalcite, hemimorphite, kettnerite, malachite, mimetite, mixite, olivenite, and rosasite. The mineral forms tiny (up to 100 × 1 μm) light greenish-gray platelets, generally intermixed with amorphous material, forming porous masses that are apparently replacements of earlier phases. It is transparent to translucent with a white streak and pearly luster. The plates are flexible with irregular fracture and no cleavage was observed The estimated Mohs hardness is ~2. The density was not measured; D_calc = 6.00 g/cm³. At room temperature, the mineral is slowly soluble in dilute HCl and rapidly soluble in concentrated HCl. Due to the thinness of the plates no birefringence was observed viewed perpendicular to them. Retardation observations from plates oriented on-edge indicate that the crystals are biaxial (+). Assuming, that the plate direction is {100}, the Z ≈ a. No pleochroism was observed. The refractive indexes were not determined; n_calc = 1.99. The Raman spectrum recorded between 4000 and 100 cm⁻¹ exhibited no features indicative of OH or H₂O. The main band in the spectrum is centered at 721 cm⁻¹. It is notably broad and exhibits indistinct shoulders at approximately 822, 634, 597, and 565 cm⁻¹ assigned to tellurate groups Te⁶⁺O₆. The bands in the spectrum are poorly resolved due to the poorly crystalline material. The average of six electron probe WDS analyses [wt% (range)] is: CaO 0.70 (0.57–0.84), CuO 6.22 (4.60–7.77), MnO 0.42 (0.29–0.52), ZnO 42.78 (40.11–45.15), SiO₂ 0.23 (0.12–0.38), As₂O₅ 0.85(0.25–1.57), TeO₃ 39.15 (37.38–41.73), total 90.35. No beam damage was observed. The low total is attributed to the thinness of the crystals that form porous aggregates and are intermixed with amorphous phases of similar composition. Small amounts of Ca, Mn, Si, and As are probably due to surrounding material in the pore space. The empirical formula based on 6 O pfu is Zn_2.39Cu_0.36Ca_0.06Mn_0.03As_0.03Si_0.02)_∑2.89Te_1.02O₆. The X-ray powder diffraction pattern of dagenaisite is similar to that of syntetic Zn₃TeO₆. The strongest lines are [d Å(I%; hkl)]: 4.311 (30; 310), 3.085 (22; 402), 3.029 (44; 222), 2.744 (68; 313,421), 2.539 (100; 132, 422), 1.6568 (48; 732,350,244). The data refined from the powder data with whole-pattern fitting shows the mineral is monoclinic, space group C2/c, a =14.87(2), b = 8.88(2), c = 10.37(2) Å, β = 93.33(2)°, V = 1367 ų, Z = 12. Single-crystal X-ray study was not performed because of the small size and poor quality of the crystals. The mineral is the natural analog of synthetic Zn₃Te⁶⁺O₆, which has a structure based on an approximate close packing of O atoms in an hhchhc sequence along [100]. In the crystal structure of Zn₃Te⁶⁺O₆ two distinct Te sites have relatively regular octahedral coordinations. Zinc in five distinct sites has very different coordination. The sites Zn1, Zn3, and Zn5 have octahedral coordination where Zn1 and Zn3 octahedra are quite distorted, Zn4 has square pyramidal fivefold-coordination and Zn2 has tetrahedral coordination. The mineral is named in honor of John Dagenais (b. 1945), of Vancouver, British Columbia, Canada, who has been an active mineral field collector for nearly 50 years. He has collected and provided for scientific research a number of new mineral species. Four cotype specimens are housed in the Natural History Museum of Los Angeles County, California, U.S.A. D.B.

Dravertite

I.V. Pekov, N.V. Zubkova, A.A. Agakhanov, V.O. Yapaskurt, N.V. Chukanov, D.I. Belakovskiy, E.G. Sidorov and D.Y. Pushcharovsky (2017) Dravertite, CuMg(SO₄)₂, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 29(2), 323–330.Pekov I.V., Zubkova N.V., Agakhanov A.A., Yapaskurt V.O., Chukanov N.V., Belakovskiy D.I., Sidorov E.G., Pushcharovsky D.Y. , 2017"Dravertite, CuMg(SO₄)₂, a new mineral species from the Tolbachik volcano, Kamchatka, Russia" European Journal of Mineralogy, vol. 29, no. 2, p. 323–330.

Dravertite (IMA 2014-104), ideally CuMg(SO₄)₂, is a new mineral discovered in two active fumaroles at the Second scoria cone, Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. In sublimates of the Arsenatnaya fumarole (360–370 °C) dravertite overgrows basalt scoria altered by fumarolic gas and is closely associated with dolerophanite, euchlorine, tenorite, hematite, langbeinite, steklite, fedotovite, wulffite, anhydrite, and anglesite. In the Yadovitaya fumarole (290–300 °C), it forms as one of the latest sulfate sublimates in association with euchlorine, chalcocyanite, steklite, alumoklyuchevskite, piypite, parawulffite, cryptochalcite, dolerophanite, hematite, tenorite, vergasovaite, cupromolybdite, yaroshevskite, and ziesite. In the Arsenatnaya fumarole, dravertite forms crude equant crystals up to 0.08 mm across forming compact clusters or spherulitic crusts up to 5 × 5 cm in size and up to 3 mm, rarely up to 1 cm thick. Polysynthetic twins were observed in some grains under the microscope. In the Yadovitaya fumarole, the new mineral forms crusts up to 1–2 cm² and up to 1 mm thick, which consist of spherulites up to 1 mm in diameter. It is light-blue to colorless, sometimes with a greenish hue (Arsenatnaya) or light brown (Yadovitaya). Dravertite has a white streak and a vitreous luster. It is transparent in small grains and translucent in aggregates. Dravertite is brittle with uneven fracture and imperfect cleavage. Mohs hardness is ~3½. Density was not measured due to micro-inclusions; D_calc = 3.508 g/cm³. In plane-polarized light, the mineral is non-pleochroic, colorless, or with a slight bluish hue. Dravertite is optically biaxial (–), α = 1.624(3), β = 1.661(3), γ = 1.663(3) (589 nm), 2V_meas = 35(10)°, 2V_calc = 26°. Dispersion of an optical axes is distinct, r > v. The main absorption bands of the IR spectrum (cm⁻¹, s = strong, w = weak, sh = shoulder) are: 2228w, 1963w (overtones of S–O stretching modes), 1270sh, 1225sh (overtones of O–S–O bending modes), 1165s, 1142s, 1097s [v₃(F₂) = asymmetric stretching vibrations of SO42−], 992s [v₁(A₁) = symmetric stretching vibrations of SO42−), 703, 658, 635w, 607 [v₄(F₂) = bending vibrations of SO42−], 492, 395sh, 370 [lattice modes involving Cu–O and Mg–O stretching vibrations and/or v₂(E) bending mode of SO42−]. Characteristic bands of BO33−,CO32−,NO3−, and hydrogen-bearing groups are absent in the IR spectrum. The average of 7 electron probe WDS analyses [wt% (range)] is: MgO 11.00 (8.59–13.71), MnO 0.16 (0.13–0.18), CuO 31.18 (27.89–34.80), ZnO 2.62 (2.12–3.08), SO₃ 54.76 (53.43–55.90), total 99.72. This gives the empirical formula Mg_0.79Mn_0.01Cu_1.14Zn_0.09S_1.99O₈ based on 8 O apfu. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 4.175 (68; 110), 3.666 (64; 111), 3.579 (63; 021), 3.443 (59; 111), 2.719 (41; 112), 2.637 (100; 022), 2.430 (68; 130) and 1.791 (24; 123, 231, 042). The unit-cell parameters refined from powder-diffraction data are: a = 4.816(2), b = 8.448(3), c = 6.776(2) Å, β = 94.56(3)°, V = 274.8 ų. Single-crystal X-ray diffraction data collected on a crystal of size 30 Ð 70 Ð 80 μm refined to R₁ = 0.0591 for 566 unique I ≥ 2σ(I) reflections shows dravertite is monoclinic, P2₁/n, a = 4.8141(3), b = 8.4443(5), c = 6.7731(4) Å:, β = 94.598(5°, V = 274.45 ų, Z = 2. The structure consists of chains of alternating edge-sharing Cu²⁺ and Mg octahedra. The chains are connected via SO₄ tetrahedra to form a pseudo-framework. Dravertite is named in honor of the Russian mineralogist and geologist Petr Lyudovikovich Dravert (1879–1945) for his significant contribution to the mineralogy of Siberia. The type specimen is deposited in the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia. O.C.G.

Ferrorhodonite

N.V. Shchipalkina, N.V. Chukanov, I.V. Pekov, S.M. Aksenov, C. McCammon, D.I. Belakovskiy, S.N. Britvin, N.N. Koshlyakova, C. Schäfer, R. Scholz, and R.K. Rastsvetaeva (2017) Ferrorhodonite, CaMn₃Fe[Si₅O₁₅], a new mineral species from Broken Hill, New South Wales, Australia. Physics and Chemistry of Minerals, 44(5), 323–334.Shchipalkina N.V., Chukanov N.V., Pekov I.V., Aksenov S.M., McCammon C., Belakovskiy D.I., Britvin S.N., Koshlyakova N.N., Schäfer C., Scholz R., Rastsvetaeva R.K. , 2017"Ferrorhodonite, CaMn₃Fe[Si₅O₁₅], a new mineral species from Broken Hill, New South Wales, Australia" Physics and Chemistry of Minerals, vol. 44, no. 5, p. 323–334.

Ferrorhodonite (IMA 2016-016), ideally CaMn₃Fe[Si₅O₁₅], is a Mn²⁺–Fe²⁺ ordered analog of rhodonite from the Broken Hill Pb–Zn–Ag deposit, Yancowinna Co., New South Wales, Australia. Broken Hill is a huge sedimentary exhalative lead, zinc, and silver deposit which had been altered by metamorphism of the granulite facies with progressive melting in the range of 600–700 °C. The melting resulted in the enrichment the polymetallic melts in Cu and Pb. Rhodonite in Broken Hill occurs mostly in the primary ores, in a pyroxenoid rock, which consists of bustamite, Mn-rich clinopyroxene, rare wollastonite, calcite, pyroxmangite, and Mn-rich olivine. Ferrorhodonite occurs associated to galena, chalcopyrite, spessartine, and quartz. It forms aggregates composed by thick tabular to short prismatic crystals, with rounded edges, up to 2 cm across. Ferrorhodonite is brown-red to pinkish brown and vitreous with a white strike. The mineral is brittle with stepped fracture. Cleavage is perfect on {201} and good on {021} and {210}. Mohs hardness is 6. D_meas = 3.71(2) g/cm³ (by hydrostatic weighting), D_calc = 3.701 g/cm³. In plane-polarized light ferrorhodonite is colorless and non-pleochroic. It is optically biaxial (+), α = 1.731(4), β = 1.736(4), γ = 1.745(5) (589 nm); 2V_meas = 80(10)°, 2 V_calc = 74°. Dispersion of an optical axes is distinct, r < v. It is not fluorescent in UV light. The IR spectrum of ferrorhodonite is very close to that of rhodonite. Bands in the range 3000–4000 cm^-1 are absent indicating the absence of OH groups. The average of electron probe EDS analysis (4 spots) [wt% (range)] is: SiO₂ 46.48 (46.41–46.58), FeO 14.46 (14.39–14.50), MnO 32.32 (32.16–32.45), MgO 0.24 (0.21–0.25), ZnO 0.36 (0.35–0.38), CaO 7.09 (7.04–7.11), total 100.95. Mössbauer spectroscopy confirmed that all Fe is Fe²⁺. The empirical formulae calculated on the basis of 15 O pfu and 16 cations is Ca_0.81Mn_2.92Fe_1.29Mg_0.04Zn_0.03 Si_4.96O₁₅. The strongest lines in the X-ray powder diffraction pattern are [d Å (I%; hkl)]: 3.337 (32; 113), 3.132 (54; 210), 3.091 (41; 023), 2.968 (100; 211), 2.770 (91; 022), 2.223 (34; 204), 2.173 (30; 310). The unit-cell parameters refined from the powder data are: a = 6.683(2), b = 7.674(2), c = 11.806(2) Å, a = 105.50(3), β = 92.26(2), γ = 93.93 (2)°, V = 581.0(3) ų. X-ray diffraction intensity data was collected in one single crystal of 0.10 × 0.12 × 0.13 mm. The single crystal unit-cell parameters are: a = 6.6766(5), b = 7.6754(6), c = 11.803(1) Å, a = 105.501(1), β = 92.275(1), γ = 93.919(1)°, V = 580.44 ų, triclinic, P1, Z = 1. The structure refinement and Mössbauer spectroscopy data showed that there are three Mn²⁺- dominant octahedrally coordinated sites (M1, M2, and M3), whereas Fe²⁺ is dominant at the highly deformed fivefold-coordinated M4 site. Therefore, ferrorhodonite is named as an analog of rhodonite with Fe²⁺ prevailing at the M4 site of the structure. Parts of the holotype specimen of ferrorhodonite are deposited in the Mineralogical Museum of the University of Hamburg, and in the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia F.C.

Fogoite-(Y)

F. Cámara, E. Sokolova, Y.A. Abdu, F.C. Hawthorne, T. Charrier, V. Dorcet, and J.-F. Carpentier (2017) Fogoite-(Y), Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃, a Group I TS-block mineral from the Lagoa do Fogo, the Fogo volcano, São Miguel Island, the Azores: Description and crystal structure. Mineralogical Magazine, 81(2), 369–381.Cámara F., Sokolova E., Abdu Y.A., Hawthorne F.C., Charrier T., Dorcet V., Carpentier J.-F. , 2017"Fogoite-(Y), Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃, a Group I TS-block mineral from the Lagoa do Fogo, the Fogo volcano, São Miguel Island, the Azores: Description and crystal structure" Mineralogical Magazine, vol. 81, no. 2, p. 369–381.

Fogoite-(Y) (IMA 2014-98), ideally Na₃Ca₂Y₂Ti(Si₂O₇)₂OF₃, is a new mineral from Lagoa do Fogo, São Miguel Island, the Azores. Fogoite- (Y) was found in a syenite xenolith in the bed of the upper part of the Ribeira Grande river near the ruins of Lombadas. The new mineral is associated with sanidine, astrophyllite, fluornatropyrochlore, ferrokent-brooksite, quartz, and ferro-katophorite. Fogoite-(Y) occurs in cavities as acicular [001] prisms with equant cross-sections, up to 2000 µm long and 50 μm × 50 μm across. Crystals are often parallel, grouped in radiating aggregates, or isolated. The main crystal forms are {100} and {010}. Macroscopically, individual crystals do not show twinning. Fogoite-(Y) is generally creamy white with white streak, but very thin crystals are colorless. It is transparent to translucent with vitreous luster. The mineral is brittle with a splintery fracture and no parting. The cleavage is very good on {100}. Mohs hardness is ~5 and D_calc = 3.523 g/cm³. Fogoite-(Y) does not fluoresce under UV light or cathode rays. It is non-pleochroic, optically biaxial (+) with α = 1.686(2), β = 1.690(2), γ = 1.702(5) (590 nm), 2V_meas = 57(1)°, 2V_calc = 60. The main absorption bands of the IR spectrum (cm^–1) are 1088, 1000, and 803 (Si–O stretching vibrations of the Si₂O₇ groups) and 677 (stretching vibrations of the Si–O–Si bridges of Si₂O₇ groups). No bands were observed in the OH-stretching region of the FTIR spectrum suggesting the absence of OH and H₂O groups in the structure. The average of 10 electron probe WDS analyses [wt% (range)] is: Ta₂O₅ 0.24 (0.23–0.25), Nb₂O₅ 3.73 (3.50–3.89), ZrO₂ 1.72 (1.51–1.89), TiO₂ 7.48 (7.35–7.60), SiO₂ 29.81 (29.40–29.85), Lu₂O₃ 0.29 (0.14–0.43), Yb₂O₃ 0.87 (0.72–0.98), Er₂O₃ 1.17 (1.17–1.18), Dy₂O₃ 1.78 (1.64–1.97), Gd₂O₃ 1.74 (1.43–1.90), Sm₂O₃ 0.41 (0.32–0.50), Nd₂O₃ 0.72 (0.52–0.85), Ce₂O₃ 0.62 (0.57–0.66), La₂O₃ 0.18 (0.17–0.19), Y₂O₃ 16.74 (16.53–16.95), FeO 0.64 (0.61–0.67), MnO 2.74 (2.71–2.77), CaO 13.89 (13.75–13.96), Na₂O 10.80 (10.72–10.95), F 6.74 (6.31–7.04), −O=F₂ 2.84, total 99.47. This gives the empirical formula (Na_2.74Mn_0.15)_Σ2.89Ca₂[Y_1.21(La_0.01Ce_0.03 Nd_0.03Sm_0.02Gd_0.08Dy_0.08Er_0.05Yb_0.04Lu_0.01)_Σ0.35Mn_0.16Zr_0.11Na_0.09Fe0.072+Ca_0.01]_Σ2 (Ti_0.76Nb_0.23Ta_0.01)_Σ1(Si_4.03O₁₄)O_1.12F_2.88, based on 18 (O+F). The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 2.954 (100; 112, 310), 3.069 (42; 300,012), 2.486 (24; 310,212), 3.960 (23; 111,210), 2.626 (21; 220), 1.820 (20; 104). Single-crystal X-ray diffraction data collected on a twinned crystal of size 0.10 × 0.02 × 0.02 mm refined to R₁ = 0.0281 for 2157 unique I ≥ 4σ(I) reflections. Fogoite-(Y) is triclinic, space group P1, a = 9.575(6), b = 5.685(4), c = 7.279(5) Å, α = 89.985(6), β = 100.933(4), γ = 101.300(5)°, V = 381.2 ų, Z = 1. Fogoite-(Y) is a framework of titanium silicate (TS) blocks, which consist of HOH sheets (H = heteropolyhedral, O = octahedral) parallel to (100). The new mineral is isostructural with götzenite and hainite. Fogoite-(Y) is named after the type locality, the Fogo volcano. The holotype is deposited in the Museo Regionale di Scienze Naturali di Torino, Torino, Italy, and in the Royal Ontario Museum, Toronto, Ontario, Canada. Another specimen from the same locality is deposited at the Muséum National d’Histoire Naturelle, Paris, France. O.C.G.

Manganiceladonite

G.O. Lepore, L. Bindi, F. Di Benedetto, E. Mugnaioli, C. Viti, A. Zanetti, M.E. Ciriotti, and P. Bonazzi (2017) A multimethodic approach for the characterization of manganiceladonite, a new member of the celadonite family from Cerchiara mine, Eastern Liguria, Italy. Mineralogical Magazine, 81(1), 167–173.Lepore G.O., Bindi L., Di Benedetto F., Mugnaioli E., Viti C., Zanetti A., Ciriotti M.E., Bonazzi P. , 2017"A multimethodic approach for the characterization of manganiceladonite, a new member of the celadonite family from Cerchiara mine, Eastern Liguria, Italy" Mineralogical Magazine, vol. 81, no. 1, p. 167–173.

Manganiceladonite (IMA 2015–052), ideally KMn³⁺MgSi₄O₁₀(OH)₂, is a new mineral discovered at the Cerchiara mine, Eastern Liguria, Italy (~44°11′58″N; 9°42′1″E). It was found in manganesiferous ores in the metacherts of the ophiolitic sequences at Cerchiara mine associated with calcite, hematite and braunite. The ore was produced by precipitation from submarine hydrothermal vents and reworked by turbiditic resedimentation. Manganiceladonite is orange-brown with micaceous appearance and forms thin and extremely elongated lamellae in radial aggregates. Crystals are transparent with silky luster and perfect cleavage on {001}. The density was not measured; D_calc = 3.042 g/cm³. Manganiceladonite is moderately pleochroic, from orange to greenish yellow. No other optical properties are given. The Raman spectrum shows a distinct peak in the OH stretching region (3738 cm^–1) that indicates the presence of OH groups in the structure. The mean of electron probe WDS analyses (number not given) [wt% (range)] is: SiO₂ 55.90 (54.34–56.84), Al₂O₃ 1.20 (0.37–2.66), Mn₂O₃ 21.50 (17.77–26.46), MgO 7.75 (5.56–9.10), Fe₂O₃ 0.47 (0.24–0.72), K₂O 9.37 (8.48–9.85), Li₂O (by LA-ICP-MS) 0.71 (0.61–0.78), F 0.35 (0.25–0.52), –O=F₂ 0.15, H₂O (estimated) 4.14, total 101.24. Electron paramagnetic resonance spectroscopic shows Mn occurs primarily as Mn³⁺ with a subordinate amount of Mn⁴⁺. This gives the empirical formula (K_0.83□_0.17) ( Mn1.143+Mg_0.80Li_0.20Fe0.023+)(Si_3.89Al_0.10)O₁₀[(OH)_1.92F_0.08] based on 23 negative charges pfu. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 10.06 (100; 001), 3.359 (60; 003), 3.328 (49; 022), 3.034 (19; 112), and 2.015 (15; 223). The unit-cell parameters refined from powder-diffraction data are: a = 5.149(1), b = 8.915(1), c = 10.304(1) Å, β = 102.03(1)°, space group C2 or C2/m. Single-crystal X-ray diffraction experiments were unsuccessful; TEM images show that manganiceladonite crystals tend to fray in bended lamellae that can be as thin as 20 nm. High resolution transmission electron microscopy and electron diffraction tomography studies confirm that the mineral belongs to the mica group. The sum of the octahedral cations indicates a transitional character between a di- and a tri-octahedral structure. Manganiceladonite is named as the Mn-dominant version of celadonite. The holotype material is deposited in the Museo di Storia Naturale, Università di Firenze, Italy. O.C.G.

Puninite and New Data on Alumoklyuchevskite And Kamchatkite

O.I. Siidra, E.V. Nazarchuk, A.N. Zaitsev, E.A. Lukina, E.Y. Avdontseva, L.P. Vergasova, N.S. Vlasenko, S.K. Filatov, R. Turner, and G.A. Karpov (2017) Copper oxosulphates from fumaroles of Tolbachik volcano: puninite, Na₂Cu₃O(SO₄)₃—a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy, 29(3), 499–510.Siidra O.I., Nazarchuk E.V., Zaitsev A.N., Lukina E.A., Avdontseva E.Y., Vergasova L.P., Vlasenko N.S., Filatov S.K., Turner R., Karpov G.A. , 2017"Copper oxosulphates from fumaroles of Tolbachik volcano: puninite, Na₂Cu₃O(SO₄)₃—a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite" European Journal of Mineralogy, vol. 29, no. 3, p. 499–510.

Puninite (IMA 2015-012), ideally Na₂Cu₃O(SO₄)₃, is a new mineral discovered in sublimates of the Glavnaya Tenoritovaya fumarole on the Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. Gas temperature in the sampling location was ~320 °C. Associated minerals are: lammerite-β, tenorite, hematite, and anhydrite. Puninite forms crystalline crusts with individual crystals up to 10 × 30 × 50 μm (usually from 5 to 20 μm in size) and irregularly shaped grains. Puninite is emerald-green with greenish streak and vitreous luster. It is brittle with uneven fracture and perfect cleavage on {100}. Mohs hardness is 2–3. The density was not measured due to the paucity of material; D_calc = 3.284 g/cm³. No fluorescence observed. Puninite is optically biaxial (+), α = 1.587(2), β = 1.611(2), γ = 1.649(2) (589 nm), 2V_calc = 80.7°, and is pale green with very weak pleochroism. The mineral is water soluble. The average of 10 electron probe WDS analyses [wt% (range)] is: Na₂O 9.98 (8.04–10.85), K₂O 0.63 (0.55–0.71), CuO 43.21 (42.50–44.57), ZnO 0.66 (0.56–0.81), SO₃ 44.33 (43.03–44.85), total 98.81. This gives the empirical formula (Na_1.76K_0.08Σ1.84 (Cu_2.97Zn_0.04)_Σ3.01(SO₄)_3.02O_0.92 based on 13 O apfu. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 8.058 (100; 200), 6.675 (19; 002), 6.466 (28; 202), 4.398 (14; 202), 4.247 (17; 113) 3.839 (34; 022), 2.854 (29; 224), 2.724 (15; 024). The unit-cell parameters refined from powder-diffraction data are: a = 17.41(1), b = 9.39(1), c = 14.40(1) Å, β = 112.04(7)°, V = 2183 ų, Z = 8, and space group C2/c. Single-crystal X-ray diffraction data collected on a crystal of size 0.16 × 0.12 × 0.14 mm refined to R₁ = 0.0349 for 1923 unique I≥ 4σ(I) reflections shows puninite is monoclinic, C2/c, with a = 17.3885(13), b = 9.4009(8), c = 14.4045(11) Å, β = 112.039(2)°, V = 2182.6 ų, and Z = 8. The structure of puninite is based on oxocentered [O₂Cu₆]⁸⁺ dimers. Four sulfate tetrahedra attach to the dimers, and the other sulfate tetrahedral groups link them in two dimensions. The resulting layers of {Cu₃O(SO₄)₃}^2– are interlinked by the alkali ions. Puninite is structurally related to euchlorine, NaKCu₃O(SO₄)₃ and to fedotovite, K₂Cu₃O(SO₄)₃. Puninite is named in honor of Yurii Olegovich Punin (1941–2014) who worked for 45 years at Department of Crystallography, St. Petersburg State University, Russia. Type material is deposited in the Mineralogical Museum of Mineralogy Department, St. Petersburg State University, St. Petersburg, Russia.

Wampenite

S.J. Mills, A.R. Kampf, F. Nestola, PA. Williams, P Leverett, L. Hejazi, D. E. Hibbs, M. Mrorsko, M. Alvaro, and A.V. Kasatkin (2017) Wampenite, C₁₈H₁₆, a new organic mineral from the fossil conifer locality at Wampen, Bavaria, Germany. European Journal of Mineralogy, 29(3), 511–515.Mills S.J., Kampf A.R., Nestola F., Williams P.A., Leverett P., Hejazi L., Hibbs D.E., Mrorsko M., Alvaro M., Kasatkin A.V. , 2017"Wampenite, C₁₈H₁₆, a new organic mineral from the fossil conifer locality at Wampen, Bavaria, Germany" European Journal of Mineralogy, vol. 29, no. 3, p. 511–515.

Wampenite (IMA 2015-061), ideally C₁₈H₁₆, is a new mineral from Wampen, Fichtelgebirge, Bavaria, Germany. It is an organic mineral observed on fossilized conifer wood. Wampenite occurs as pale amber-colored tablets flattened on {001}, and blades elongated parallel to [100] up to about 0.4 mm in size. The only prominent form is {001}. Twinning on {001}is ubiquitous. Crystals of wampenite are transparent with a greasy to vitreous luster, are brittle with an irregular fracture, and have distinct and easy cleavage on {001}. Additional indistinct cleavages may exist on {010} and {110}. The estimated Mohs hardness is <1. D_meas = 1.15(1), D_calc = 1.12 g/cm³. Wampenite is pleochroic X = Y (pale amber) < Z (amber). It is optically biaxial (+). Refraction indices were not measured due to dissolution of the material in immersion liquids. α ≈ 1.58 (est.), β ≈ 1.66 (calc.), γ ≈1.79 (calc.), 2V_meas = 82(2)° in white light; X = b; Z ^ c ≈ 20°. No dispersion (sense not given) was observed. The main absorption bands of the IR spectrum (cm⁻¹) are: 3000-3300 (C-H stretching), 2884–3000 (CH₃ stretching), 1361–1446, and 1523–1623 (C=C modes). As high-resolution mass spectrometry confirmed the molecular formula C₁₈H₁₆, the presence of a broad band at 3400 cm⁻¹ is probably due to adsorbed water. An automatic CHN analyzer gave C = 92.5, H = 7.6, N= 0.0, total 100.1 wt%, in agreement with formula C₁₈H₁₆ within error. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 4.88 (100; 112,112), 11.92 (49; 002), 5.32 (43; 110), 3.504 (33; 024,122), 4.366 (28; 020), 3.656 (23; 120,121,115). The unit-cell parameters refined from powder-diffraction data are: a = 6.744(4), b = 8.719(4), c = 23.720(3) Å, β = 90.61(3)°, V = 1394.7 ų, and Z = 4. Single-crystal X-ray diffraction data collected on a crystal of size 0.45 × 0.21 × 0.04 mm refined to R₁ = 0.1088 shows wampenite is monoclinic, space group P2₁/a, with a = 6.7331(19), b = 8.689(3), c = 23.709(7) Å, β = 90.118(6)°, V = 1387.0 ų and Z = 4. The structure solution revealed the molecular nature of the mineral where an aromatic phenanthrene moiety has an axial methyl group at one end and a disordered propen- 2-yl (methylvinyl) terminal group at the other end. Wampenite is named for its locality. The type specimen was deposited in the Natural History Museum of Los Angeles County, California, U.S.A. O.C.G.

Zincoberaunite

N.V. Chukanov, I.V. Pekov, I.E. Grey, J.R. Price, S.N. Britvin, M.G. Krzhizhanovskaya, A.R. Kampf, B. Dünkel, E. Keck, D.I. Belakovskiy, and C.M. MacRae (2017) Zincoberaunite, ZnFe53+(PO₄)₄(OH)₅·6H₂O, a new mineral from the Hagendorf South pegmatite, Germany. Mineralogy and Petrology, 111(3), 351–361.Chukanov N.V., Pekov I.V., Grey I.E., Price J.R., Britvin S.N., Krzhizhanovskaya M.G., Kampf A.R., Dünkel B., Keck E., Belakovskiy D.I., MacRae C.M. , 2017"Zincoberaunite, ZnFe53+(PO₄)₄(OH)₅·6H₂O, a new mineral from the Hagendorf South pegmatite, Germany" Mineralogy and Petrology, vol. 111, no. 3, p. 351–361.

Zincoberaunite (IMA 2015-117), ideally ZnFe53+(PO₄)₄(OH)₅·6H₂O, the Zn analog of beraunite, occurs in the abandoned Cornelia Mine Open Cut at the Hagendorf South granitic pegmatite, Hagendorf, Bavaria, Germany (49°39′1″N, 12°27′35″E). In the holotype specimen, zincoberaunite forms pale gray (with silky luster) radial aggregates up to 3 mm consisting of flexible fibers up to 1.5 mm long and up to 3 μm thick, and is associated to potassium feldspar, quartz, jungite, phosphophyllite, and mitridatite. In the cotype specimen zincoberaunite occurs as silvery white (with silky luster) mats of thin needles ranging from ~100 nm up to 2 μm in diameter, with lengths up to 200 μm, and is in close association with the new schoonerite-related mineral flurlite. Aggregates of the mineral sit on mounds of densely packed needles of plimerite. The three minerals occur on mitridatite, associated to Zn-bearing beraunite, schoonerite, parascholzite/ scholzite, robertsite, and altered phosphophyllite. The needles of zincoberaunite are elongated along [010] and somewhat flattened on {100}. Cleavage is good on {100} and the fracture is splintery. Hardness is not reported. D_calc = 2.92 g/cm³. No fluorescence in UV light was observed. Zincoberaunite is pleochroic X = Y (pale beige) < Z (light orange-brown). It is optically biaxial (−), α = 1.745(5), β = 1.760(5), γ = 1.770(5) (white light); 2V_meas = 80(5)°, 2V_calc = 78°; Y = b, Z ≈ c. Dispersion of optical axes is intermediate, r < ν. Absorption bands in the IR spectrum are (cm⁻¹; s = strong band, sh = shoulder): 3562, 3515w, 3276, 2990sh (O-H stretching vibrations of OH⁻ anions and H₂O molecules), 1645sh, 1625 (bending vibrations of H₂O molecules), 1140sh, 1070s, 1032s, 990s, 970sh [ν₃(F₂) = asymmetric P–O stretching vibrations of PO43− anions], 940sh [ν₁(A₁) = symmetric P–O stretching vibrations of PO43− anions], 885sh, 798w (Fe³⁺…O–H and Zn…O–H bending vibrations), 665sh, 603, 580 [triply degenerate ν₄(F₂) O–P–O bending mode of PO43− anions], 466, 440, 405sh, 368 [lattice modes involving Fe³⁺–O stretching and ν₂(E) O–P–O bending vibrations, possibly combined with libration modes of H₂O molecules]. The electron probe WDS analysis (average of 5 analyses of the holotype/7 analyses of the cotype) [wt% (range)] are: MgO 0.28 (0–0.58)/bdl (below detection limits), CaO 0.47 (0.24–0.78)/bdl, MnO bdl/0.28 (0.12–0.44), ZnO 7.36 (6.58–7.83)/6.3 (4.30–8.88), Al₂O₃ 0.88 (0.42–1.23)/bdl, Fe₂O₃ (from crystal-chemical considerations and by analogy with another beraunite-group minerals) 42.42 (41.84–43.48)/43.7 (39.6–47.8), P₂O₅ 31.63 (30.47–32.70)/30.2 (28.0–31.7), H₂O (by chromatography) 16.2(5)/ (assuming 5 OH and 6 H₂O pfu) 16.5, total 99.24/97.0. The empirical formula of the holotype based on 27 O apfu is (Zn_0.83Ca_0.08Mg_0.06)_Σ0.97 (Fe4.883−Al_0.16)_ΣE5.04(PO₄)_4.09(OH)_4.78 ·5.86H₂O and the one of cotype based on 4 P apfu (because H₂O was calculated) is (Zn_0.83Mn0.042+Fe0.163+)Σ0.93Fe53+(PO₄)₄(OH)_5.02·5.98H₂O. The strongest lines in the X-ray powder diffraction pattern of the holotype are [d Å (I%; hkl)]: 10.37 (100: 200), 9.58 (32; 002), 7.24 (26; 202), 4.817 (22; 111), 4.409 (13; 112), 3.483 (14; 114,600), 3.431 (14; 404), 3.194 (15; 006,314), 3.079 (33; 314). The unit-cell parameters refined from the powder data are: a = 20.837(2), b = 5.1624(4), c = 19.250(1) Å, β = 93.252(5)°, V = 2067.3 ų. A needle measuring 2 μm in diameter by 40 μm long was used for collecting single crystal data set of the cotype sample using synchrotron radiation (λ = 0.7100 Å) at 100 K. The single-crystal unit-cell parameters are: a = 20.836(4), b = 5.148(1), c = 19.228(4) Å, β = 93.21(3)°, V = 2059.2 ų, monoclinic, C2/c, Z = 4. The crystal structure of zincoberaunite was refined starting from the model of beraunite by Moore and Kampf (1992), and yielded R_exp = 0.0047 (Rietveld method) R₁> = 0.0797 for 1900 unique reflections. The crystal structure of zincoberaunite is built up by heteropolyhedral slabs coplanar to (100) containing PO₄ tetrahedra and M(1,2,3) octahedra. In zincoberaunite Zn is dominant in the internal M1 octahedron. The slabs are interconnected via corner-sharing with M4O₂(OH)₂(H₂O)₂ octahedra to form a 3D framework containing large 10-sided channels along [010]. The water molecules Ow3 are located in the channels and are held by H-bonding to the framework atoms O6 and Ow2. The hydrogen bonding scheme found is the same as reported for tvrdýite, a beraunite-group member with Al > Fe³⁺. Zincoberaunite is the fourth member of the beraunite group. The general crystal-chemical formula of beraunite-group minerals may be written as follows: M1M2M3₂M4₂(PO₄)₄(OH,O)(OH)₄·6H₂O where M1 = Fe²⁺, Fe³⁺, Mn²⁺, Zn, Mg; M2, M3, and M4 = Fe³⁺, Al, and minor Cr. The sites M3 and M4 can contain minor amounts of Zn. Zincoberaunite is named as the analog of beraunite Fe²⁺Fe53+(PO₄)₄(OH)₅·6H₂O with Zn predominant among bivalent cations. The holotype material is deposited in the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia. The cotype specimen is deposited in the Museum Victoria, Australia. F.C.

Zincostrunzite

A.R. Kampf, I.E. Grey, P. Alves, S.J. Mills, B.P. Nash, C.M. MacRae, and E. Keck (2017) Zincostrunzite, ZnFe23+(PO₄)₂(OH)₂·6.5H₂O, a new mineral from the Sitio do Castelo mine, Portugal, and the Hagendorf-Süd pegmatite, Germany. European Journal of Mineralogy, 29(2), 315–322.Kampf A.R., Grey I.E., Alves P., Mills S.J., Nash B.P., MacRae C.M., Keck E. , 2017"Zincostrunzite, ZnFe23+(PO₄)₂(OH)₂·6.5H₂O, a new mineral from the Sitio do Castelo mine, Portugal, and the Hagendorf-Süd pegmatite, Germany" European Journal of Mineralogy, vol. 29, no. 2, p. 315–322.

Zincostrunzite (IMA 2016-023), ideally ZnFe23+(PO)₄(OH)₂·6.5H₂O, is a new mineral from the Sitio do Castelo tungsten mine in Portugal, and the Hagendorf-Süd pegmatite in Germany. At the Sitio do Castelo mine, zincostrunzite occurs in vugs of a secondary phosphate assemblage resulting from the alteration of triplite–zwieselite, on a matrix composed of triplite–zwieselite, fluorapatite, and cryptomelane. Other minerals found in direct association with zincostrunzite are cacoxenite, plimerite, strengite, strunzite, and isokite. At Hagendorf-Süd, zincostrunzite was found in a nodule of former triphylite that had been replaced by phosphophyllite and minor apatite. Zincostrunzite has been found as single crystals as well as strunzite crystals with zincostrunzite rims. At Sitio do Castelo, zincostrunzite forms prisms up to 2 mm in length. At Hagendorf-Süd, the mineral makes up portions of needles that are up to about 5 mm in length. Crystals are elongated on [001] with forms {010} and {110} and poorly formed terminations, probably {001}. There is ubiquitous twinning by 180° rotation on [010] with compositional plane {120}. Crystals from Sitio do Castelo are light brownish yellow, and those from Hagendorf-Süd are silvery white. They are transparent with a vitreous to silky luster and a white streak. Zincostrunzite is brittle with irregular, splintery fracture, and at least one perfect cleavage parallel to [001], probably either {110} or {100}. The Mohs hardness is ~21/2. For the Sitio do Castelo sample, D_meas = 2.66(1) and D_calc = 2.655 g/cm³. The mineral slowly dissolves in dilute HCl (minutes) and rapidly dissolve in concentrated HCl at room temperature. Zincostrunzite is pleochroic X = nearly colourless < Y = light brownish yellow < Z = darker brownish yellow optically biaxial (−), α = 1.620(2), β = 1.672(2), γ = 1.720(2), 2V_meas = 89.5(5)°, 2V_calc = 85.1°; Z ^ c = 3°; X ≈ a. The averages of 9 (Sitio do Castelo)/4 (Hagendorf-Süd) electron probe WDS analyses [wt% (range)] are: ZnO 12.07 (10.38–13.63)/15.13 (14.46–15.83), MnO 3.28 (1.02–4.70)/3.74 (0.00–7.36), Fe₂O₃ 32.00 (31.20–32.63)/29.23 (22.97–32.97), P₂O₅ 28.53 (27.77–29.05)/28.24 (27.57–29.27), H₂O 27.30/27.02, total 103.18/103.39. H₂O was calculated on the basis of P = 2, charge balance, and 16.5 O apfu. This gives the empirical formula (Zn0.74Mn0.232+)Σ0.97Fe1.993+(PO₄)₂(OH)₂·6.5H₂O (Sitio do Castelo) and (Zn0.93Mn0.082+)Σ1.01(Fe1.843+Mn0.192+)Σ2.03(PO₄)₂(OH)₂·6.5H₂O (Hagendorf-Süod) based on 16.5 O apfu. The strongest lines in the X-ray powder-diffraction pattern [d Å (I%; hkl)] are: 8.87 (100; 100,010,110), 5.32 (95; 111,011), 4.457 (30; 200), 4.287 (41; 020,220), 3.310 (29; 120,211), 3.220 (75; multiple), 1.9116 (25; multiple), and 1.6222 (32; multiple). The unit-cell parameters refined from powder-diffraction data are: a = 10.190(10), b = 9.778(10), c = 7.338(11) Å, α = 91.21(2)°, β = 97.96(2)°, γ = 116.99(4)°, and V = 642.3 ų. Single-crystal X-ray diffraction data collected on a crystal from Sitio do Castelo of size 0.27 × 0.55 × 0.30 mm refined to R₁ = 0.0715 for 3243 unique I ≥ 4σ(I) reflections shows zincostrunzite is triclinic, P1, a = 10.1736(6), b = 9.7999(5), c = 7.3296(2) Å, α = 91.325(4), β = 97.895(6), γ = 116.948(4)°, V = 642.22 ų, and Z = 2. The new mineral is isostructural with other members of the strunzite group but have an additional split H₂O site. Zincostrunzite is named as the Zn analog of strunzite where it substitutes Mn²⁺. Two cotypes from the Sitio do Castelo mine are housed in the Natural History Museum of Los Angeles County, Los Angeles, California, U.S.A., and one cotype from Hagendorf-Süd is housed in the Museum Victoria, Melbourne, Australia. O.C.G.