Incorporation of Mg in phase Egg, AlSiO3OH: Toward a new polymorph of phase H, MgSiH2O4, a carrier of water in the deep mantle

Luca Bindi; Aleksandra Bendeliani; Andrey Bobrov; Ekaterina Matrosova; Tetsuo Irifune

doi:10.2138/am-2020-7204

Published by De Gruyter December 30, 2019

Incorporation of Mg in phase Egg, AlSiO₃OH: Toward a new polymorph of phase H, MgSiH₂O₄, a carrier of water in the deep mantle

Luca Bindi , Aleksandra Bendeliani , Andrey Bobrov , Ekaterina Matrosova and Tetsuo Irifune

From the journal American Mineralogist

https://doi.org/10.2138/am-2020-7204

Showing a limited preview of this publication:

Abstract

The crystal structure and chemical composition of a crystal of Mg-bearing phase Egg with a general formula M1−x3+Mx2+SiO4H1−x(M3+=Al, Cr;M2+=Mg, Fe),where x = 0.35, produced by subsolidus reaction at 24 GPa and 1400 °C of components of subducted oceanic slabs (peridotite, basalt, and sediment), was analyzed by electron microprobe and single-crystal X‑ray diffraction. Neglecting the enlarged unit cell and the consequent expansion of the coordination polyhedra (as expected for Mg substitution for Al), the compound was found to be topologically identical to phase Egg, AlSiO₃OH, space group P21/n, with lattice parameters a = 7.2681(8), b = 4.3723(5), c = 7.1229(7) Å, b = 99.123(8)°, V = 223.49(4) Å³, and Z = 4. Bond-valence considerations lead to hypothesize the presence of hydroxyl groups only, thereby excluding the presence of the molecular water that would be present in the hypothetical end-member MgSiO₃·H₂O. We thus demonstrate that phase Egg, considered as one of the main players in the water cycle of the mantle, can incorporate large amounts of Mg in its structure and that there exists a solid solution with a new hypothetical MgSiH₂O₄ end-member, according to the substitution Al³⁺ ↔ Mg²⁺ + H⁺. The new hypothetical MgSiH₂O₄ end-member would be a polymorph of phase H, a leading candidate for delivering significant water into the deepest part of the lower mantle.

Keywords: phase Egg; phase H; hydrous dense magnesium silicate; sample synthesis; electron microprobe analysis; X‑ray diffraction; crystal structure

Acknowledgments

Paul Asimow, George Rossman, and Fabrizio Nestola are thanked for the efforts to obtain an IR/Raman spectrum of Mg-bearing phase Egg. The manuscript took advantage from the revision of three anonymous reviewers. Zhicheng Jing is gratefully acknowledged for the efficient handling of the manuscript.

Funding The research was supported by “progetto di Ateneo 2016, University of Firenze” to L.B. and by the Russian Science Foundation, project no. 17-17-01169 to A.B., A.B., and E.S.

References cited

Bindi, L., Nishi, M., Tsuchiya, J., and Irifune, T. (2014) Crystal chemistry of dense hydrous magnesium silicates: The structure of phase H, MgSiH₂O₄ synthesized at 45 GPa and 1000 °C. American Mineralogist, 99, 1802–1805.10.2138/am.2014.4994Search in Google Scholar

Brese, N.E., and O’Keeffe, M. (1991) Bond-valence parameters for solids. Acta Crystallographica, B47, 192–197.10.1107/S0108768190011041Search in Google Scholar

Bruker (2016) APEX3, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.Search in Google Scholar

Bulatov, V.K., Brey, G.P., Girnis, A.V., Gerdes, A., and Höfer, H.E. (2014) Carbonated sediment–peridotite interaction and melting at 7.5–12 GPa. Lithos, 200-201, 368–385.10.1016/j.lithos.2014.05.010Search in Google Scholar

Eggleton, R.A., Boland, N.J., and Ringwood, A.E. (1978) High pressure synthesis of a new aluminum silicate: Al₅Si₅O₁₇(OH). Geochemical Journal, 12, 191–194.10.2343/geochemj.12.191Search in Google Scholar

Frost, D.J., and Fei, Y. (1998) Stability of phase D at high pressure and high temperature. Journal of Geophysical Research, 103, 7463–7474.10.1029/98JB00077Search in Google Scholar

Fukuyama, K., Ohtani, E., Shibazaki, Y., Kagi, H., and Suzuki, A. (2017) Stability field of phase Egg, AlSiO₃OH at high pressure and high temperature: possible water reservoir in mantle transition zone. Journal of Mineralogical and Petrological Sciences, 112, 31–35.10.2465/jmps.160719eSearch in Google Scholar

Irifune, T., Kurio, A., Sakamoto, S., Inoue, T., Sumiya. H., and Funakoshi, K. (2004) Formation of pure polycrystalline diamond by direct conversion of graphite at high pressure and high temperature. Physics of the Earth and Planetary Interiors, 143-144, 593–600.10.1016/j.pepi.2003.06.004Search in Google Scholar

Kakizawa, S., Inoue, T., Nakano, H., Kuroda, M., Sakamoto, N., and Yurimoto, H. (2018) Stability of Al-bearing superhydrous phase B at the mantle transition zone and the uppermost lower mantle. American Mineralogist, 103, 1221–1227.10.2138/am-2018-6499Search in Google Scholar

Kaminsky, F. (2012) Mineralogy of the lower mantle: A review of ‘super-deep’ mineral inclusions in diamond. Earth-Science Reviews, 110, 127–147.10.1016/j.earscirev.2011.10.005Search in Google Scholar

Katsura, T., and Ito, E. (1989) The system Mg₂SiO₄-Fe₂SiO₄ at high pressure and temperatures: Precise determination of stabilities of olivine, modified spinel, and spinel. Journal of Geophysical Research, 94, 15663–15670.10.1029/JB094iB11p15663Search in Google Scholar

Komatsu, K., Kuribayashi, T., Sano, A., Ohtani, E., and Kudoh, Y. (2006) Redetermination of the high-pressure modification of AlOOH from single-crystal synchrotron data. Acta Crystallographica, E62, i216–i218.10.1107/S160053680603916XSearch in Google Scholar

Komatsu, K., Sano-Furukawa, A., and Kagi, H. (2011) Effects of Mg and Si ions on the symmetry of d-AlOOH. Physics and Chemistry of Minerals, 38, 727–733.10.1007/s00269-011-0445-0Search in Google Scholar

Liu, G., Liu, L., Yang, L., Yi, L., Li, Y., Liu, H., Gao, Y., Zhuang, C., and Li, S. (2018) Crystal structure and elasticity of Al-bearing phase H under high pressure. AIP Advances, 8, 055219.10.1063/1.5030375Search in Google Scholar

Nishi, M., Irifune, T., Tsuchiya, J., Tange, Y., Nishihara, Y., Fujino, K., and Higo, Y. (2014) Stability of hydrous silicate at high pressures and water transport to the deep lower mantle. Nature Geoscience, 7, 224–227.10.1038/ngeo2074Search in Google Scholar

Ohira, I., Ohtani, E., Sakai, T., Miyahara, M., Hirao, N., Ohishi, Y., and Nishijima, M. (2014) Stability of a hydrous-phase, AlOOH-MgSiO₂(OH)₂ and a mechanism for water transport into the base of lower mantle. Earth and Planetary Science Letters, 401, 12–17.10.1016/j.epsl.2014.05.059Search in Google Scholar

Ohtani, E., Mizobata, H., and Yurimoto, H. (2000) Stability of dense magnesium silicate phases in the systems Mg₂SiO₄-H₂O and MgSiO₃-H₂O at pressures up to 27 GPa. Physics and Chemistry of Minerals, 27, 533–544.10.1007/s002690000097Search in Google Scholar

Pamato, M.G., Myhill, R., Boffa-Ballaran, T., Frost, D.J., Heidelbach, F., and Miyajima, N. (2015) Lower-mantle water reservoir implied by the extreme stability of a hydrous aluminosilicate. Nature Geoscience, 8, 75–79.10.1038/ngeo2306Search in Google Scholar

Pearson, D.G., Brenker, F.E., Nestola, F., McNeill, J., Nasdala, L., Hutchison, M. T., Matveev, S., Mather, K., Silversmit, G., Schmitz, S., Vekemans, B., and Vincze, L. (2014) Hydrous mantle transition zone indicated by ringwoodite included within diamond. Nature, 507, 221–224.10.1038/nature13080Search in Google Scholar

Plank, T., and Langmuir, C.H. (1998) The chemical composition of subducting sediment and its consequences for the crust and mantle. Chemical Geology, 145, 325–394.10.1016/S0009-2541(97)00150-2Search in Google Scholar

Poli, S., Franzolin, E., Fumagalli, P., and Crottini, A. (2009) The transport of carbon and hydrogen in subducted oceanic crust: an experimental study to 5 GPa. Earth and Planetary Science Letters, 278, 350–360.10.1016/j.epsl.2008.12.022Search in Google Scholar

Robinson, K., Gibbs, G.V., and Ribbe, P.H. (1971) Quadratic elongation: a quantitative measure of distortion in coordination polyhedra. Science, 172, 567–570.10.1126/science.172.3983.567Search in Google Scholar

Schmidt, M.W., Finger, L.W., Angel, R.J., and Dinnebier, R.E. (1998) Synthesis, crystal structure, and phase relations of AlSiO₃OH, a high-pressure hydrous phase. American Mineralogist, 83, 881–888.10.2138/am-1998-7-820Search in Google Scholar

Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.10.1107/S0108767307043930Search in Google Scholar

Shieh, S.R., Mao, H-K., Hemley, R.J., and Ming, L.C. (1998) Decomposition of phase D in the lower mantle and the fate of dense hydrous silicates in subducting slabs. Earth and Planetary Science Letters, 159, 13–23.10.1016/S0012-821X(98)00062-4Search in Google Scholar

Smith, E.M., Shirey, S.B., Nestola, F., Bullock, E.S., Wang, J., Richardson, S.H., and Wang, W. (2016) Large gem diamonds from metallic liquid in Earth’s deep mantle. Science, 354, 1403–1405.10.1126/science.aal1303Search in Google Scholar PubMed

Smith, E.M., Shirey, S.B., Richardson, S.H., Nestola, F., Bullock, E.S., Wang, J., and Wang, W. (2018) Blue boron-bearing diamonds from Earth’s lower mantle. Nature, 560, 84–87.10.1038/s41586-018-0334-5Search in Google Scholar PubMed

Tsuchiya, J. (2013) First principles prediction of a new high-pressure phase of dense hydrous magnesium silicates in the lower mantle. Geophysical Research Letters, 40, 4570–4573.10.1002/grl.50875Search in Google Scholar

Wilson, A.J.C., Ed. (1992) International Tables for Crystallography Volume C: Mathematical, physical and chemical tables. Kluwer Academic, Dordrecht, NLSearch in Google Scholar

Wirth, R., Vollmer, C., Brenker, F., Matsyuk, S., and Kaminsky, F. (2007) Inclusions of nanocrystalline hydrous aluminium silicate “phase Egg” in superdeep diamonds from Juina (Mato Grosso State, Brazil). Earth and Planetary Science Letters, 259, 384–399.10.1016/j.epsl.2007.04.041Search in Google Scholar

Wu, Y., Fei, Y., Jin, Z., and Liu, X. (2009) The fate of subducted upper continental crust: An experimental study. Earth and Planetary Science Letters, 282, 275–284.10.1016/j.epsl.2009.03.028Search in Google Scholar

Received: 2019-07-12

Accepted: 2019-09-17

Published Online: 2019-12-30

Published in Print: 2020-01-28

Incorporation of Mg in phase Egg, AlSiO₃OH: Toward a new polymorph of phase H, MgSiH₂O₄, a carrier of water in the deep mantle

Abstract

Acknowledgments

References cited

Journal and Issue

Articles in the same Issue