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The crystal structure of a mineral related to paulkerrite

Published/Copyright: July 28, 2010
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 208 Issue 1

Abstract

An apparently new phosphate mineral (named “benyacarite”) showing evident relationships with paulkerrite and mantienneite, but richer in Mn+2, was found in granitic pegmatites in Argentina (Cerro Blanco, Tanti, Còrdoba) where it is associated with other phosphates such as triplite etc., and fluorides such as pachnolite. The unit-cell parameters are: ao = 10.561(5) Å, bo = 20.585(8) Å, co = 12.516(2) Å, orthorhombic, space group Pbca, Z = 4, Dx = 2.37 gcm−3. The crystal structure has been refined to R(unweighted) = 0.034 and R(weighted) = 0.040 using 1023 independent reflections. It contains layers perpendicular to [010] of two kinds of octahedra, M(2)O5(O,F) and TiO5(O,F), the first essentially centered by Fe+3 atoms, with some Ti+4; the fluorine atom shares vertices of both octahedra. On both sides of these layers there are PO4 tetrahedra, with one face approximately parallel to the layers; the three corners of this face are shared with octahedra centered on Ti and M(2), whereas the remaining one is shared with another M(1)O6 octahedron centered by Mn+2 atoms (in part replaced by Fe+2). This network of octahedra and tetrahedra leaves cavities occupied by K+ and water molecules. According to these data, and to microprobe analysis the chemical formula corresponds to (H2O0.78K0.16Na0.03)2Ti(Mn0.75+2Fe0.21+2Mg0.04)2(Fe0.68+3Ti0.28+4Al0.07)2(PO4)4-(O0.6F0.4)2 · 14H2O. On the basis of the knowledge of the structure of “benyacarite” and the strong similarities of its crystal chemistry with those of paulkerrite and mantienneite, a better characterization of these minerals is obtained. These species imply substitution of Mn+2 by Mg or Fe+2, and of Fe+3 by Ti+4, or Al, respectively.

Published Online: 2010-7-28
Published in Print: 1993-1-1

© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München

Articles in the same Issue

  1. The modular analysis of Ca2SiO4-Ca(OH)2-Ca4Si3O10 structures
  2. Neue ternäre Phasen in den Systemen Seltene Erden-Lithium-Zinn
  3. Structure refinement of BaCl2 · D2O and SrCl2 · D2O by neutron powder diffraction
  4. Structure of bis(salicylato)-di(nicotinamide)copper(II)
  5. Synthesis and structure of Ba2LaAg5S6 and Ba2YAg5S6
  6. Crystal structure of mesogenic material – 2-(4′-cyano phenyl)-5-n-heptyl-l,3 dioxane
  7. Crystal structure of mesogenic material – 4′-n-pentyl cyclohexyl-(4-n-pentyl cyclohexane)-1-carboxylate
  8. The crystal structure of a mineral related to paulkerrite
  9. Coverage dependent adsorption sites in the K/Cu(100) system: A crystal truncation rod analysis
  10. Crystal structure of thulium oxide sulfide (2/2/1), Tm2O2S
  11. Crystal structure of thulium sulfide (5/7), Tm5S7
  12. Crystal structure of 3′-mercapto-7,7,7′,7′-tetramethyl-2,2′[bi]bicyclo[2.2.1]heptylidene-3-thione, C20H29S2
  13. Crystal structure of 3-bromo-2,6-dimethoxy-N,N-dimethylthiobenzamide, (C6H2)Br(OCH3)2CSN(CH3)2
  14. Crystal structure of “C2-symmetric” head-to-tail photodimer of 9-(2-hydroxy-2-propyl)anthracene, C34H32O2
  15. Crystal structure of centrosymmetric head-to-tail photodimer of 9-(2-hydroxy-2-propyl)anthracene, C34H32O2
  16. Crystal structure of pentacarbonyl-pyridine-tungsten (0), W(CO)5(NC5H5)
  17. Crystal structure of pentacarbonyl-4-methyl-pyridine-tungsten(0), W(CO)5(NC5H4)CH3
  18. Crystal structure of 4-(4-hydroxy-1-butoxy)-4′-hydroxybiphenyl (H4HBP), C16H18O3
  19. Crystal structure of 4-(6-hydroxy-1-hexoxy)-4′-hydroxybiphenyl (H6HBP), C18H22O3
  20. Crystal structure of 4,5-dichloro-5-ethyl-6-methyl-2-methoxy-2-oxo-5,6-dihydro-2H-oxaphosphorine, C8H13Cl2O3P
  21. Crystal structure of (tetrahydrothiophene)-trichlorogold(III), C4H8AuCl3S
  22. Crystal structure of p-fluorobenzene-sulphonamide, C6H6FNO2S
  23. Crystal structure of (diphenylsulphide)-trichlorogold(III), C12H10AuCl3S
  24. Crystal structure of 2-methyl-5-phenyltriazolo-[4,5-d]-triazole, C9H8N6
  25. Crystal structure of 4-acetyl[2.2]paracyclophane, C18H18O
  26. Crystal structure of 1-amino-4-(4-methoxy-phenoxy)-anthraquinone-(9,10), C21H15NO4
  27. Crystal structure of N-[2,2-bis(diphenylphosphino)ethyl]-N′,N′-dimethyl-1,3-propanediamine-P,P′-tetracarbonylchromium, (CO)4Cr(P(C6H5)2)2(C2H3)(NHC3H6N(CH3)2)
  28. Crystal structure of bis-(4,4′,5,5′-tetramethyl-thieno)[3,2-c;2′,3′-e]-1,2-dithiin, C12H12S4
  29. Crystal structure of bis-thieno[3,2-c;2′,3′-e]-1,2-dithiin, C8H4S4
  30. Crystal structure of 2,3,4,5,10,11,12,13-octamethyl-1,6,7,8,9,14,15,16-octathia-tetracyclopenta [a,c,g,i] cyclododecene, C24H24S8
  31. Crystal structure of (5R,1S′)-5-[1-N,N-dibenzyl-amino)ethyl]-2(3H)-4,5-dihydrofuranone, CH(CH2)2COOCHCH3NCH2(C6H5)CH2(C6H5)
  32. Crystal structure of (2S,1′S)-2-[1-(N,N-dibenzyl-amino)ethyl]-3(2H)-4,5-dihydrofuranone, OCH2CH2COCHCH(CH3)NCH2(C6H5)CH2(C6H5)
  33. Crystal structure of exo-6-methoxy-l-(4-pyridyl)-1a,2,3,7b-tetrahydro-1H-cyclopropa[a]naphthalene, CH3O(C10H9)CH(C5H4N)
  34. Crystal structure of 1-(2,4-dinitrophenyl)-3-methyl-1H-cycloheptapyrazol-6-one, C15H10N4O5
https://doi.org/10.1524/zkri.1993.208.Part-1.57

Articles in the same Issue

  1. The modular analysis of Ca2SiO4-Ca(OH)2-Ca4Si3O10 structures
  2. Neue ternäre Phasen in den Systemen Seltene Erden-Lithium-Zinn
  3. Structure refinement of BaCl2 · D2O and SrCl2 · D2O by neutron powder diffraction
  4. Structure of bis(salicylato)-di(nicotinamide)copper(II)
  5. Synthesis and structure of Ba2LaAg5S6 and Ba2YAg5S6
  6. Crystal structure of mesogenic material – 2-(4′-cyano phenyl)-5-n-heptyl-l,3 dioxane
  7. Crystal structure of mesogenic material – 4′-n-pentyl cyclohexyl-(4-n-pentyl cyclohexane)-1-carboxylate
  8. The crystal structure of a mineral related to paulkerrite
  9. Coverage dependent adsorption sites in the K/Cu(100) system: A crystal truncation rod analysis
  10. Crystal structure of thulium oxide sulfide (2/2/1), Tm2O2S
  11. Crystal structure of thulium sulfide (5/7), Tm5S7
  12. Crystal structure of 3′-mercapto-7,7,7′,7′-tetramethyl-2,2′[bi]bicyclo[2.2.1]heptylidene-3-thione, C20H29S2
  13. Crystal structure of 3-bromo-2,6-dimethoxy-N,N-dimethylthiobenzamide, (C6H2)Br(OCH3)2CSN(CH3)2
  14. Crystal structure of “C2-symmetric” head-to-tail photodimer of 9-(2-hydroxy-2-propyl)anthracene, C34H32O2
  15. Crystal structure of centrosymmetric head-to-tail photodimer of 9-(2-hydroxy-2-propyl)anthracene, C34H32O2
  16. Crystal structure of pentacarbonyl-pyridine-tungsten (0), W(CO)5(NC5H5)
  17. Crystal structure of pentacarbonyl-4-methyl-pyridine-tungsten(0), W(CO)5(NC5H4)CH3
  18. Crystal structure of 4-(4-hydroxy-1-butoxy)-4′-hydroxybiphenyl (H4HBP), C16H18O3
  19. Crystal structure of 4-(6-hydroxy-1-hexoxy)-4′-hydroxybiphenyl (H6HBP), C18H22O3
  20. Crystal structure of 4,5-dichloro-5-ethyl-6-methyl-2-methoxy-2-oxo-5,6-dihydro-2H-oxaphosphorine, C8H13Cl2O3P
  21. Crystal structure of (tetrahydrothiophene)-trichlorogold(III), C4H8AuCl3S
  22. Crystal structure of p-fluorobenzene-sulphonamide, C6H6FNO2S
  23. Crystal structure of (diphenylsulphide)-trichlorogold(III), C12H10AuCl3S
  24. Crystal structure of 2-methyl-5-phenyltriazolo-[4,5-d]-triazole, C9H8N6
  25. Crystal structure of 4-acetyl[2.2]paracyclophane, C18H18O
  26. Crystal structure of 1-amino-4-(4-methoxy-phenoxy)-anthraquinone-(9,10), C21H15NO4
  27. Crystal structure of N-[2,2-bis(diphenylphosphino)ethyl]-N′,N′-dimethyl-1,3-propanediamine-P,P′-tetracarbonylchromium, (CO)4Cr(P(C6H5)2)2(C2H3)(NHC3H6N(CH3)2)
  28. Crystal structure of bis-(4,4′,5,5′-tetramethyl-thieno)[3,2-c;2′,3′-e]-1,2-dithiin, C12H12S4
  29. Crystal structure of bis-thieno[3,2-c;2′,3′-e]-1,2-dithiin, C8H4S4
  30. Crystal structure of 2,3,4,5,10,11,12,13-octamethyl-1,6,7,8,9,14,15,16-octathia-tetracyclopenta [a,c,g,i] cyclododecene, C24H24S8
  31. Crystal structure of (5R,1S′)-5-[1-N,N-dibenzyl-amino)ethyl]-2(3H)-4,5-dihydrofuranone, CH(CH2)2COOCHCH3NCH2(C6H5)CH2(C6H5)
  32. Crystal structure of (2S,1′S)-2-[1-(N,N-dibenzyl-amino)ethyl]-3(2H)-4,5-dihydrofuranone, OCH2CH2COCHCH(CH3)NCH2(C6H5)CH2(C6H5)
  33. Crystal structure of exo-6-methoxy-l-(4-pyridyl)-1a,2,3,7b-tetrahydro-1H-cyclopropa[a]naphthalene, CH3O(C10H9)CH(C5H4N)
  34. Crystal structure of 1-(2,4-dinitrophenyl)-3-methyl-1H-cycloheptapyrazol-6-one, C15H10N4O5
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