Home Physical Sciences Kinetics of dehydrogenation of riebeckite Na2Fe23+Fe32+Si8O22(OH)2: An HT-FTIR study
Article
Licensed
Unlicensed Requires Authentication

Kinetics of dehydrogenation of riebeckite Na2Fe23+Fe32+Si8O22(OH)2: An HT-FTIR study

  • Giancarlo Della Ventura ORCID logo , Francesco Radica , Federico Galdenzi , Umberto Susta , Gianfelice Cinque , Mariangela Cestelli-Guidi , Boriana Mihailova and Augusto Marcelli
Published/Copyright: March 28, 2022
Become an author with De Gruyter Brill
Author Information
American Mineralogist
From the journal American Mineralogist Volume 107 Issue 4

Abstract

In this work, we address the kinetics of dehydrogenation occurring at high temperatures (HT) in riebeckite, a sodic amphibole with the ideal composition Na2Fe23+Fe32+Si8O22(OH)2.We performed isothermal experiments on both powders and single-crystals up to 560 °C and monitored the O-H stretching signal by Fourier transform infrared (FTIR) spectroscopy. Single-crystals show an initial increase in IR absorption intensity due to increasing vibrational amplitudes of the O-H bond stretching, not observed for powders. The OH-intensities vs. time were fitted using the formalism for first-order reactions. The calculated activation energies for H+ diffusion in riebeckite are 159 ± 15 kJ/mol for powders and 216 ± 20 kJ/mol for single crystals, respectively. The exponential factor m in the Avrami-Erofeev equation obtained for crystals ranges between 1.02 and 1.31, suggesting that, unlike powders, the dehydration process in crystals is not a purely first-order reaction. This implies that a second energy barrier must be considered, i.e., diffusion of H+ through the crystal. FTIR imaging showed that H+ diffusion occurs mainly perpendicular to the silicate double-chain. Our results confirm that the release of H+ from riebeckite occurs after the irreversible Fe2+-to-Fe3+ exchange, thus at temperatures >550 °C. To be effective, the process needs the presence of external oxygen that, by interacting with H+ at the crystal surface, triggers the release of H2O molecules. This implies that oxidizing conditions are required for the amphibole to be an efficient water source at depth.

Keywords: Riebeckite; HT-FTIR spectroscopy; FTIR imaging; Fe-oxidation; dehydration kinetics; activation energy

Funding statement: G.D.V. was supported by the Grant to Department of Science, Roma Tre University (MIUR-Italy Dipartimenti di Eccellenza, ARTICOLO 1, COMMI 314–337 LEGGE 232/2016). B.M. acknowledges financial support by the Deutsche Forschungsgemeinschaft (project MI 1127/7-2). The experiment at the MIRIAM beamline B22 of Diamond were supported by beamtime SM11425.

Acknowledgements

Thanks are due to F.C. Hawthorne, D.M. Jenkins, and an anonymous reviewer for helping to improve the quality of our manuscript.

References cited

Addison, W.E., and Sharp, J.H. (1962a) Amphiboles. Part III. The reduction of crocidolite. Journal of the Chemical Society (Resumed), 3693–3698.10.1039/jr9620003693Search in Google Scholar

Addison, W.E., and Sharp, J.H. (1962b) A mechanism for the oxidation of ferrous iron in hydroxylated silicates. Meeting of the Clay Minerals Group of the Mineralogical Society, Leeds, April 1962. 73-79.10.1180/claymin.1962.005.28.03Search in Google Scholar

Addison, C.C., Addison, W.E., Neal, G.H., and Sharp, J.H. (1962a) Amphiboles. Part I. The oxidation of crocidolite. Journal of the Chemical Society (Resumed), 1468–1471.10.1039/jr9620001468Search in Google Scholar

Addison, W.E., Neal, G.H., and Sharp, J.H. (1962b) Amphiboles. Part II. The kinetics of oxidation of crocidolite. Journal of the Chemical Society (Resumed), 1472–1475.10.1039/jr9620001472Search in Google Scholar

Addison, W.E., and White, A.D. (1968) The oxidation of Bolivian crocidolite. Mineralogical Magazine and Journal of the Mineralogical Society, 36, 791–796.10.1180/minmag.1968.036.282.05Search in Google Scholar

Avrami, M. (1939) Kinetics of Phase Change. I. General Theory. The Journal of Chemical Physics, 7, 1103–1112.10.1063/1.1750380Search in Google Scholar

Barnes, V.E. (1930) Changes in hornblende at about 800 °C. American Mineralogist, 15, 393–417.Search in Google Scholar

Biedermann, A.R., Bender Koch, C., Pettke, T., and Hirt, A.M. (2015) Magnetic anisotropy in natural amphibole crystals. American Mineralogist, 100, 1940–1951.10.2138/am-2015-5173Search in Google Scholar

Brabander, D.J., and Giletti, B.J. (1995) Strontium diffusion kinetics in in amphiboles and significance to thermal history determinations. Geochimica et Cosmochimica Acta , 59, 2223–2238.10.1016/0016-7037(95)00102-6Search in Google Scholar

Brabander, D.J., Hervig, R.L., and Jenkins, D.M. (1995) Experimental determination of F-OH interdiffusion in tremolite and significance to fluorine-zoned amphiboles. Geochimica et Cosmochimica Acta , 59, 3549–3560.10.1016/0016-7037(95)00222-LSearch in Google Scholar

Brady, J.B., and McCallister, R.H. (1983) Diffusion data for clinopyroxenes from homogenization and self-diffusion experiments. American Mineralogist, 68, 95–105.Search in Google Scholar

Brown, M.E., Dollimore, D., and Galwey, A.K. (1980) Reactions in the Solid State. Elsevier.Search in Google Scholar

Carbone, M., Ballirano, P., and Caminiti, R. (2008) Kinetics of gypsum dehydration at reduced pressure: An energy dispersive X-ray diffraction study. European Journal of Mineralogy, 20, 621–627.10.1127/0935-1221/2008/0020-1826Search in Google Scholar

Christensen, N.I., and Mooney, W.D. (1995) Seismic velocity structure and composition of the continental crust: A global view. Journal of Geophysical Research: Solid Earth, 100, 9761–9788.10.1029/95JB00259Search in Google Scholar

Clark, M.W., and Freeman, A.G. (1967) Kinetics and mechanism of dihydroxylation of crocidolite. Transactions of the Faraday Society, 63, 2051–2056.10.1039/tf9676302051Search in Google Scholar

Della Ventura, G., Iezzi, G., Redhammer, G.J., Hawthorne, F.C., Scaillet, B., and Novembre, D. (2005) Synthesis and crystal-chemistry of alkali amphiboles in the system Na2O-MgO-FeO-Fe2O3-SiO2-H2O as a function of fO2. American Mineralogist, 90, 1375–1383.10.2138/am.2005.1682Search in Google Scholar

Della Ventura, G., Marcelli, A., and Bellatreccia, F. (2014) SR-FTIR microscopy and FTIR imaging in the Earth Sciences. In G.S. Henderson, D.R. Neuville, R.T. Downs, Eds., Spectroscopic methods in Mineralogy and Materials Sciences, 78, pp 447-479. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.10.1515/9781614517863.447Search in Google Scholar

Della Ventura, G., Susta, U., Bellatreccia, F., Marcelli, A., Redhammer, G., and Oberti, R. (2017) Deprotonation of Fe-dominant amphiboles: Single-crystal HT-FTIR spectroscopic studies of synthetic potassic-ferro-richterite. American Mineralogist, 102, 117–125.10.2138/am-2017-5859Search in Google Scholar

Della Ventura, G., Mihailova, B., Susta, U., Cestelli Guidi, M., Marcelli, A., Schlüter, J., and Oberti, R. (2018a) The dynamics of Fe oxydation in riebeckite: A model for amphiboles. American Mineralogist, 103, 1103–1111.10.2138/am-2018-6382Search in Google Scholar

Della Ventura, G., Galdenzi, F., Cibin, G., Oberti, R., Xu, W., Macis, S., and Marcelli, A. (2018b) Iron oxidation dynamics vs. temperature of synthetic potassic-ferro-richterite: a XANES investigation. Physical Chemistry Chemical Physics: Pccp, 20, 21764–21771.10.1039/C8CP04249GSearch in Google Scholar

Ernst, W.G. (1962) Synthesis, stability relations, and occurrence of riebeckite and riebeckite-arfvedsonite solid solutions. The Journal of Geology, 70, 689–736.10.1086/626866Search in Google Scholar

Ernst, W.G., and Wai, M. (1970) Mössbauer, infrared, X-ray and optical study of cation ordering and dehydrogenation in natural and heat-treated sodic amphiboles. American Mineralogist, 55, 1226–1258.Search in Google Scholar

Evans, B.W. (2007) The synthesis and stability of some end-member amphiboles. In F.C. Hawthorne, R. Oberti, G. Della Ventura, and A. Mottana, Eds., Amphiboles: Crystal Chemistry, Occurrence, and Health Issues, 67, p. 261–286. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.Search in Google Scholar

Farver, J.R. (2010) Oxygen and hydrogen diffusion in minerals. In Y. Zhang and D.J. Cherniak, Eds., Diffusion of Minerals and Melts, 72, p. 447–507. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.10.2138/rmg.2010.72.10Search in Google Scholar

Farver, J.R., and Giletti, B.J. (1985) Oxygen diffusion in amphiboles. Geochimica et Cosmochimica Acta, 49, 1403–1411.10.1016/0016-7037(85)90290-XSearch in Google Scholar

Fisler, D.K., Mackwell, S.J., and Petsch, S. (1997) Grain boundary diffusion in in enstatite. Physics and Chemistry of Minerals, 24, 264–273.10.1007/s002690050038Search in Google Scholar

Galdenzi, F., Della Ventura, G., Cibin, G., Macis, S., and Marcelli, A. (2020) Accurate Fe3+/Fetot ratio from XAS spectra at the Fe K-edge. Radiation Physics and Chemistry, 175, 10808810.1016/j.radphyschem.2018.12.008Search in Google Scholar

Galwey, A.K., and Brown, M.E. (1999) Thermal decomposition of ionic solids. Elsevier.Search in Google Scholar

Graham, C.M. (1981) Experimental hydrogen isotope studies III: Diffusion of hydrogen in hydrous minerals, and stable isotope exchange in metamorphic rocks. Contributions to Mineralogy and Petrology, 76, 216–228.10.1007/BF00371961Search in Google Scholar

Graham, C.M., Harmon, R.S., and Sheppard, S.M.F. (1984) Experimental hydrogen isotope studies: hydrogen isotope exchange between amphibole and water. American Mineralogist, 69, 128–138.Search in Google Scholar

Hancock, J.D., and Sharp, J.H. (1972) Method of comparing solid-state kinetic data and its application to the decomposition of kaolinite, brucite, and BaCO3. Journal of the American Ceramic Society, 55, 74–77.10.1111/j.1151-2916.1972.tb11213.xSearch in Google Scholar

Hawthorne, F.C. (1983) The crystal chemistry of the amphiboles. Canadian Mineralogist, 21, 173–480.10.1515/9781501508523-002Search in Google Scholar

Hawthorne, F.C., and Oberti, R. (2007) Amphiboles: Crystal chemistry. In F.C. Hawthorne, R. Oberti, G. Della Ventura, and A. Mottana (eds) Amphiboles: Crystal Chemistry, Occurrence, and Health Issues, 67, p. 1–54. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.10.1515/9781501508523Search in Google Scholar

Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., and Welch, M.D. (2012) Nomenclature of the amphibole super-group. American Mineralogist, 97, 2031–2048.10.2138/am.2012.4276Search in Google Scholar

Hodgson, A.A., Freeman, A.G., and Taylor, H.F.V. (1965) The thermal decomposition of crocidolite from Koegas, South Africa. Mineralogical Magazine and Journal of the Mineralogical Society, 35, 5–29.10.1180/minmag.1965.035.269.04Search in Google Scholar

Hu, H., Dai, L., Li, H., Sun, W., and Li, B. (2018) Effect of dehydrogenation on the electrical conductivity of Fe-bearing amphibole: Implications for high conductivity anomalies in subduction zones and continental crust. Earth and Planetary Science Letters, 498, 27–37.10.1016/j.epsl.2018.06.003Search in Google Scholar

Ingrin, J., and Blanchard, M. (2000) Hydrogen mobility in single crystal kaersutite. EMPG VIII. Journal of Conference Abstracts, 5, 52.Search in Google Scholar

Johnson, N.M., and Fegley, B. (2003) Tremolite decomposition on Venus II. Products, kinetics, and mechanism. Icarus, 164, 317–333.10.1016/S0019-1035(03)00102-7Search in Google Scholar

King, P.L., Hervig, R.L., Holloway, J.R., Vennemann, T.W., and Righter, K. (1999) Oxy-substitution and dehydrogenation in mantle-derived amphibole megacrysts. Geochimica et Cosmochimica Acta, 63, 3635–3651.10.1016/S0016-7037(99)00162-3Search in Google Scholar

King, P.L., Hervig, R.L., Holloway, J.R., Delaney, J.S., and Dyar, M.D. (2000) Partitioning of Fe3+/Fetotal between amphibole and basanitic melt as a function of oxygen fugacity. Earth and Planetary Science Letters, 178, 97–112.10.1016/S0012-821X(00)00071-6Search in Google Scholar

Kuzmany, H. (2009) Solid State Spectroscopy: An Introduction. Springer-Verlag.10.1007/978-3-642-01479-6Search in Google Scholar

Manthilake, G., Bolfan-Casanova, N., Novella, D., Mookherjee, M., and Andrault, D. (2016) Dehydration of chlorite explains anomalously high electrical conductivity in the mantle wedges. Science Advances, 2, e1501631.10.1126/sciadv.1501631Search in Google Scholar PubMed PubMed Central

McCammon, C.A., Frost, D.J., Smyth, J.R., Laustsen, H.M.S., Kawamoto, T., Ross, N.L., and van Aken, P.A. (2004) Oxidation state of iron in hydrous mantle phases: implications for subduction and mantle oxygen fugacity. Physics of the Earth and Planetary Interiors, 143-144, 157–169.10.1016/j.pepi.2003.08.009Search in Google Scholar

Mihailova, B., Della Ventura, G., Waeselmann, N., Wei, X., Schlüter, J., Galdenzi, F., Marcelli, A., Redhammer, G.J., Boiocchi, M., and Oberti, R. (2021) Atomistic insight into lithospheric conductivity revealed by phonon-electron excitations in hydrous iron-bearing silicates. Communication Materials, 2, 57 (2021), https://doi.org/10.1038/s43246-021-00161-y10.1038/s43246-021-00161-ySearch in Google Scholar

Moukarika, A., Coey, J.M.D., and Dang, N.V. (1983) Magnetic order in crocidolite asbestos. Physics and Chemistry of Minerals, 9, 269–275.10.1007/BF00309577Search in Google Scholar

Oberti, R., Della Ventura, G., and Cámara, F. (2007) New amphibole compositions: natural and synthetic. In F.C. Hawthorne, R. Oberti, G. Della Ventura, and A. Mottana, Eds., Amphiboles: Crystal Chemistry, Occurrence, and Health Issues, 67, p. 89–123. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.10.1515/9781501508523Search in Google Scholar

Oberti, R., Boiocchi, M., Zema, M., and Della Ventura, G. (2016) Synthetic potassic-ferro-richterite: 1. Composition, crystal structure refinement and HT behavior by in operando single-crystal X-ray diffraction. The Canadian Mineralogist, 54, 353–369.10.3749/canmin.1500073Search in Google Scholar

Oberti, R., Boiocchi, M., Zema, M., Hawthorne, F.C., Redhammer, G.J., Susta, U., and Della Ventura, G. (2018) Understanding the peculiar HT behavior of riebeckite: Expansivity, deprotonation, Fe-oxidation and a novel cation disorder scheme. European Journal of Mineralogy, 30, 437–449.10.1127/ejm/2018/0030-2712Search in Google Scholar

Oberti, R., Boiocchi, M., and Zema, M. (2019) Thermoelasticity, cation exchange, and deprotonation in Fe-rich holmquistite: toward a crystal-chemical model for the high-temperature behavior of orthorhombic amphiboles. American Mineralogist, 104, 1829–1839.10.2138/am-2019-6966Search in Google Scholar

Patterson, J.H. (1965) The thermal disintegration of crocidolite in air and in vacuum. Mineralogical Magazine and Journal of the Mineralogical Society, 35, 31–37.10.1180/minmag.1965.035.269.05Search in Google Scholar

Phillips, M.W., Popp, R.K., and Clowe, C.A. (1988) Structural adjustments accompanying oxidation-dehydrogenation in amphiboles. American Mineralogist, 73, 500–506.Search in Google Scholar

Phillips, M.W., Draheim, J.E., Popp, R.K., Clowe, C.A., and Pinkerton, A.A. (1989) Effect of oxidation-dehydrogenation in tschermakitic hornblende. American Mineralogist, 74, 764–773.Search in Google Scholar

Phillips, M.W., Popp, R.K., and Clowe, C.A. (1991) A structural investigation of oxidation effects in air-heated grunerite. American Mineralogist, 76, 1502–1509.Search in Google Scholar

Popp, R.K., Virgo, D., Yoder, H.S., Hoering, T.C., and Phillips, M.W. (1995) An experimental study of phase equilibria and Fe oxy-component in kaersutitic amphibole: implications for the fH2 and aH2O in the upper mantle. American Mineralogist, 80, 534–548.10.2138/am-1995-5-613Search in Google Scholar

Putnis, A., Winkler, B., and Fernandez-Diaz, L. (1990) In situ IR spectroscopic and thermogravimetric study of the dehydration of gypsum. Mineralogical Magazine, 54, 123–128.10.1180/minmag.1990.054.374.14Search in Google Scholar

Radica, F., D., Ventura, G., Bellatreccia, F., C., and Guidi, M. (2015) HT-FTIR micro-spectroscopy of cordierite: The CO2 absorbance from in situ and quench experiments. Physics and Chemistry of Minerals, 43, 69 –81.10.1007/s00269-015-0775-4Search in Google Scholar

Robb, L. (2005) Introduction to Ore-Forming Processes. Blackwell.Search in Google Scholar

Rouxhet, P.G., Gillard, J.L., and Fripiat, J.J. (1972) Thermal decomposition of amosite, crocidolite and biotite. Mineralogical Magazine, 38, 583–592. Schmidbauer, E., Kunzmann, T., Fehr, T., and Hochleitner, R. (1996) Electrical conductivity, thermopower and 57Fe Mössbauer spectroscopy on an Fe-rich amphibole, arfvedsonite. Physics and Chemistry of Minerals, 23, 99–106.10.1180/minmag.1972.038.297.07Search in Google Scholar

Schmidbauer, E., Kunzmann, T., Fehr, T., and Hochleitner, R. (2000) Electrical resistivity and 57Fe Mossbauer spectra of Fe-bearing calcic amphiboles. Physics and Chemistry of Minerals, 27, 347–356.10.1007/s002690050264Search in Google Scholar

Schmidt, M.W., and Poli, S. (1998) Experimentally based water budgets for dehydrating slabs and consequences for arc magma generation. Earth and Planetary Science Letters, 163, 361–379.10.1016/S0012-821X(98)00142-3Search in Google Scholar

Su, W., Baker, D.R., Pu, L., Bai, L., Liu, X., and O’Shaughnessy, C. (2015) Chlorine-hydroxyl diffusion in pargasitic amphiboles. American Mineralogist, 100, 138–147.10.2138/am-2015-4779Search in Google Scholar

Susta, U., Della Ventura, G., Hawthorne, F.C., Abdu, Y.A., Day, M.C., Mihailova, B., and Oberti, R. (2018) The crystal-chemistry of riebeckite, ideally Na2Fe32+Fe23+Si8O22(OH)2: a multidisciplinary study. Mineralogical Magazine, 82, 837–852.10.1180/minmag.2017.081.064Search in Google Scholar

Suzuoki, T., and Epstein, S. (1976) Hydrogen isotope fractionation between OH-bearing minerals and water. Geochimica et Cosmochimica Acta, 40, 1229–1240.10.1016/0016-7037(76)90158-7Search in Google Scholar

Tolland, H. (1973) Mantle conductivity and electrical properties of garnet, mica and amphibole. Nature, 241, 35–36.Search in Google Scholar

Ungaretti, L. (1980) Recent developments in X-ray single crystal diffractometry applied to the crystal-chemical study of amphiboles. Godisnjak Jugonslavenskog Centra za Kristalografiju, 15, 29–65.Search in Google Scholar

Wang, D., Guo, Y., Yu, Y., and Karato, S. (2012) Electrical conductivity of amphibole-bearing rocks: influence of dehydration. Contributions to Mineralogy and Petrology, 164, 17–25.10.1007/s00410-012-0722-zSearch in Google Scholar

Welch, M.D., Cámara, F., Della Ventura, G., and Iezzi, G. (2007) Non-ambient in situ studies of amphiboles. In F.C. Hawthorne, R. Oberti, G. Della Ventura, and A. Mottana, Eds., Amphiboles: Crystal Chemistry, Occurrence, and Health Issues, 67, p. 223-260. Reviews in Mineralogy and Geochemistry, Mineralogical Society of America, Chantilly, Virginia.10.1515/9781501508523-007Search in Google Scholar
Received: 2021-02-17
Accepted: 2021-04-21
Published Online: 2022-03-28
Published in Print: 2022-04-26

© 2022 Mineralogical Society of America

Articles in the same Issue

  1. Perspectives
  2. Resolving the conundrum of equilibrium solubility of smectites
  3. Manjiroite or hydrous hollandite?
  4. Petrologic evolution of boninite lavas from the IBM Fore-arc, IODP Expedition 352: Evidence for open-system processes during early subduction zone magmatism
  5. Coupled hydrogen and fluorine incorporation in garnet: New constraints from FTIR, ERDA, SIMS, and EPMA
  6. Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study
  7. The electrical conductivity of albite feldspar: Implications for oceanic lower crustal sequences and subduction zones
  8. A high-pressure, clinopyroxene-structured polymorph of albite in highly shocked terrestrial and meteoritic rocks
  9. Water in the crystal structure of CaSiO3 perovskite
  10. Release of chromite nanoparticles and their alteration in the presence of Mn-oxides
  11. The absorption indicatrix as an empirical model to describe anisotropy in X-ray absorption spectra of pyroxenes
  12. Atomistic mechanism of cadmium incorporation into hydroxyapatite
  13. Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit
  14. Gamma radiation effects on quartz Al and Ti center electron spin resonance signal intensity: Implications for quartz provenance discrimination
  15. A new high-pressure experimental apparatus to study magmatic processes at precisely controlled redox conditions
  16. Effect of structural water on the elasticity of orthopyroxene
  17. Cryogenic heat capacity measurements and thermodynamic analysis of lithium aluminum layered double hydroxides (LDHs) with intercalated chloride
  18. A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates
  19. Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy
  20. The crystal structure of Fe2S at 90 GPa based on single-crystal X-ray diffraction techniques
  21. Hydration-driven stabilization and volume collapse of grain boundaries in Mg2SiO4 forsterite predicted by first-principles simulations
  22. Kinetics of dehydrogenation of riebeckite Na2Fe23+Fe32+Si8O22(OH)2: An HT-FTIR study
  23. Ferro-tschermakite with polysomatic chain-width disorder identified in silician magnetite from Wirrda Well, South Australia: A HAADF STEM study
  24. New Mineral Names: High-Pressure and Precious Minerals
https://doi.org/10.2138/am-2022-8021
Keywords for this article
Riebeckite; HT-FTIR spectroscopy; FTIR imaging; Fe-oxidation; dehydration kinetics; activation energy

Articles in the same Issue

  1. Perspectives
  2. Resolving the conundrum of equilibrium solubility of smectites
  3. Manjiroite or hydrous hollandite?
  4. Petrologic evolution of boninite lavas from the IBM Fore-arc, IODP Expedition 352: Evidence for open-system processes during early subduction zone magmatism
  5. Coupled hydrogen and fluorine incorporation in garnet: New constraints from FTIR, ERDA, SIMS, and EPMA
  6. Incorporation mechanism of structurally bound gold in pyrite: Insights from an integrated chemical and atomic-scale microstructural study
  7. The electrical conductivity of albite feldspar: Implications for oceanic lower crustal sequences and subduction zones
  8. A high-pressure, clinopyroxene-structured polymorph of albite in highly shocked terrestrial and meteoritic rocks
  9. Water in the crystal structure of CaSiO3 perovskite
  10. Release of chromite nanoparticles and their alteration in the presence of Mn-oxides
  11. The absorption indicatrix as an empirical model to describe anisotropy in X-ray absorption spectra of pyroxenes
  12. Atomistic mechanism of cadmium incorporation into hydroxyapatite
  13. Copper isotope evidence for a Cu-rich mantle source of the world-class Jinchuan magmatic Ni-Cu deposit
  14. Gamma radiation effects on quartz Al and Ti center electron spin resonance signal intensity: Implications for quartz provenance discrimination
  15. A new high-pressure experimental apparatus to study magmatic processes at precisely controlled redox conditions
  16. Effect of structural water on the elasticity of orthopyroxene
  17. Cryogenic heat capacity measurements and thermodynamic analysis of lithium aluminum layered double hydroxides (LDHs) with intercalated chloride
  18. A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates
  19. Radiation-induced changes in vanadium speciation in basaltic glasses: Implications for oxybarometry measurements using vanadium K-edge X-ray absorption spectroscopy
  20. The crystal structure of Fe2S at 90 GPa based on single-crystal X-ray diffraction techniques
  21. Hydration-driven stabilization and volume collapse of grain boundaries in Mg2SiO4 forsterite predicted by first-principles simulations
  22. Kinetics of dehydrogenation of riebeckite Na2Fe23+Fe32+Si8O22(OH)2: An HT-FTIR study
  23. Ferro-tschermakite with polysomatic chain-width disorder identified in silician magnetite from Wirrda Well, South Australia: A HAADF STEM study
  24. New Mineral Names: High-Pressure and Precious Minerals
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Winner of the OpenAthens UX Award 2026
Winner of the OpenAthens UX Award 2026
Have an idea on how to improve our website?
Please write us.
© 2026 De Gruyter Brill
Downloaded on 5.3.2026 from https://www.degruyterbrill.com/document/doi/10.2138/am-2022-8021/html
Scroll to top button