Jump to ContentJump to Main Navigation
Show Summary Details
More options …

American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian


IMPACT FACTOR 2018: 2.631

CiteScore 2018: 2.55

SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103

Online
ISSN
1945-3027
See all formats and pricing
More options …
Volume 104, Issue 6

Issues

High-pressure phase transitions of clinoenstatite

John D. Lazarz / Przemyslaw Dera
  • Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, U.S.A
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Yi Hu
  • Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, U.S.A
  • Department of Geology and Geophysics, School of Ocean and Earth Science and Technology, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, U.S.A
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Yue Meng / Craig R. Bina
  • Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois 60208, U.S.A
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Steven D. Jacobsen
  • Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois 60208, U.S.A
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2019-05-27 | DOI: https://doi.org/10.2138/am-2019-6740

Abstract

Clinoenstatite (Mg2Si2O6) undergoes a well-known phase transition from a low-pressure form (LPCEN, space group P21/c) to a high-pressure form (HPCEN, space group C2/c) at ~6 GPa. High-pressure structure refinements of HPCEN were carried out based on single-crystal X‑ray diffraction experiments between 9.5 and 35.5 GPa to determine its P-V equation of state and structural evolution over an expanded pressure range relevant to pyroxene metastability. The best-fit isothermal equation of state to our data combined with the five data points between 5.34 and 7.93 GPa from Angel and Hugh-Jones (1994) yields a second-order Birch-Murnaghan equation with KT0 = 121(2) GPa and V0 = 403.9(5) Å3 (with KʹT0 = 4 implied). Further reduction of misfit upon fitting a third-order Birch-Murnaghan equation is not significant at the 90% confidence level. At ~45 GPa, a transition from HPCEN to a P21/c-structured polymorph (HPCEN2) was observed, which is isostructural to the P21/c phase recently observed in diopside (CaMgSi2O6) at 50 GPa (Plonka et al. 2012) and in clinoferrosilite (Fe2Si2O6) at 30–36 GPa (Pakhomova et al. 2017). Observation of HPCEN2 in Mg2Si2O6 completes the third apex of the pyroxene quadrilateral wherein HPCEN2 is found, facilitating a broader view of clinopyroxene crystal chemistry at conditions relevant to metastability in the Earth’s mantle along cold subduction geotherms.

Keywords: MgSiO3; clinoenstatite; enstatite; pyroxene; single-crystal X‑ray diffraction

References cited

  • Agrusta, R., Van Hunen, J., and Goes, S. (2014) The effect of metastable pyroxene on the slab dynamics. Geophysical Research Letters, 41(24), 8800–8808. http://doi.org/10.1002/2014GL062159

  • Akaogi, M., and Akimoto, S. (1977) Pyroxene-garnet solid-solution equilibria in the systems Mg3Si4O12-Mg3Al2Si3O12 and Fe4Si4O12-Fe3Al2Si3O12 at high pressures and temperatures. Physics of the Earth and Planetary Interiors, 15, 90–106.Google Scholar

  • Akashi, A., Nishihara, Y., Takahashi, E., Nakajima, Y., Tange, Y., and Funakoshi, K. (2009) Orthoenstatite/clinoenstatite phase transformation in MgSiO3 at high-pressure and high-temperature determined by in situ X‑ray diffraction: Implications for nature of the X discontinuity. Journal of Geophysical Research, 114, B04206.Google Scholar

  • Angel, R.J., and Hugh-Jones, D.A. (1994) Equations of state and thermodynamic properties of enstatite pyroxenes. Journal of Geophysical Research, 99(B10), 19777–19783.Google Scholar

  • Angel, R.J., Chopelas, A., and Ross, N.L. (1992) Stability of high-density clinoenstatite at upper-mantle pressures. Nature, 355, 322–324.Google Scholar

  • Angel, R.J., Gonzalez-Platas, J., and Alvaro, M. (2014) EosFit7c and a Fortran module (library) for equation of state calculations. Zeitschrift für Kristallographie, 229(5), 405–419.Google Scholar

  • Bevington, P.R., and Robinson, D.K. (2003) Data Reduction and Error Analysis for the Physical Sciences, 3rd ed. McGraw-Hill.Google Scholar

  • Bina, C.R. (2013) Mineralogy: Garnet goes hungry. Nature Geoscience, 6(5), 335–336.Google Scholar

  • Bina, C.R., Stein, S., Marton, F.C., and Van Ark, E.M. (2001) Implications of slab mineralogy for subduction dynamics. Physics of the Earth and Planetary Interiors, 127(1–4), 51–66.Google Scholar

  • Blöchl, P.E. (1994). Projector augmented-wave method. Physical Review B, 50(24), 17953–17979. https://doi.org/10.1103/PhysRevB.50.17953

  • Cottaar, S., Heister, T., Rose, I., and Unterborn, C. (2014) BurnMan: A lower mantle mineral physics toolkit. Geochemistry, Geophysics, Geosystems, 15(4), 1164–1179.Google Scholar

  • Dera, P., Zhuravlev, K., Prakapenka, V., Rivers, M.L., Finkelstein, G.J., Grubor-Urosevic, O.,Tschaunder, O., Clark, S.M., and Downs, R. T. (2013) High pressure single-crystal micro X‑ray diffraction analysis with GSE_ADA/RSV software. High Pressure Research, 33(3), 466–484.Google Scholar

  • Deuss, A., and Woodhouse, J.H. (2004) The nature of the Lehmann discontinuity from its seismological Clapeyron slopes. Earth and Planetary Science Letters, 225, 295–304. https://doi.org/10.1016/j.epsl.2004.06.021

  • Ferot, A., and Bolfan-Casanova, N. (2012) Water storage capacity in olivine and pyroxene to 14 GPa: Implications for the water content of the Earth’s upper mantle and nature of seismic discontinuities. Earth and Planetary Science Letters, 350, 218–230. https://doi.org/10.1016/j.epsl.2012.06.022

  • Finkelstein, G.J., Dera, P.K., and Duffy, T.S. (2015) Phase transitions in orthopyroxene (En90 to 49 GPa from single-crystal X‑ray diffraction. Physics of the Earth and Planetary Interiors, 244, 78–86.Google Scholar

  • Gasparik, T. (1989) Transformation of enstatite-diopside-jadeite pyroxenes to garnet. Contributions to Mineralogy and Petrology, 102, 389–405.Google Scholar

  • Hogrefe, A., Rubie, D.C., Sharp, T.G., and Seifert, F. (1994) Metastability of enstatite in deep subducting lithosphere. Nature. https://doi.org/10.1038/372351α0

  • Hu, Y., Dera, P., and Zhuravlev, K. (2015) Single-crystal diffraction and Raman spectroscopy of hedenbergite up to 33 GPa. Physics and Chemistry of Minerals, 42(7), 595–608.Google Scholar

  • Hu, Y., Kiefer, B., Bina, C.R., Zhang, D., and Dera, P.K. (2017) High-pressure γ-CaMgSi2O6 Does penta-coordinated silicon exist in the Earth’s mantle? Geophysical Research Letters, 44, 11,340–11,348.Google Scholar

  • Hugh-Jones, D.A., and Angel, R.J. (1997) Effect of Ca2+ and Fe2+ on the equation of state of MgSiO3 orthopyroxene. Journal of Geophysical Research, 102, 12,333–12,340.Google Scholar

  • Jacobsen, S.D., Liu, Z., Boffa Bollaran, T., Littlefield, E.F., Ehm, L., and Hemley, R.J. (2010) Effect of H2O on upper mantle phase transitions in MgSiO3 Is the depth of the seismic X-discontinuity an indicator of mantle water content? Physics of the Earth and Planetary Interiors, 183(1–2), 234–244.Google Scholar

  • King, S.D., Frost, D.J., and Rubie, D.C. (2015) Why cold slabs stagnate in the transition zone. Geology, 43(3), 231–234. https://doi.org/10.1130/G36320.1

  • Kresse, G., and Hafner, J. (1993) Ab initio molecular dynamics for open-shell transition metals. Physical Review B, 48(17), 48–51.Google Scholar

  • Kung, J., Li, B., Uchida, T., Wang, Y., Neuville, D., and Liebermann, R.C. (2004) In situ measurements of sound velocities and densities across the orthopyroxene high-pressure clinopyroxene transition in MgSiO3 at high pressure. Physics of the Earth and Planetary Interiors, 147(1), 27–44.Google Scholar

  • Mao, H.K., Xu, J., and Bell, P.M. (1986) Calibration of the ruby pressure gauge to 800 kbar under quasi-hydrostatic conditions. Journal of Geophysical Research, 91(B5), 4673–4676.Google Scholar

  • Morimoto, N., Fabries, J., Ferguson, A.K., Ginzburg, I.V., Ross, M., Seifeit, F.A., and Zussman, J. (1989) Nomenclature of pyroxenes. Canadian Mineralogist, 2(5), 198–221.Google Scholar

  • Nestola, F., Tribaudino, M., and Boffa Ballaran, T. (2004) High pressure behavior, transformation and crystal structure of synthetic iron-free pigeonite. American Mineralogist, 89, 189–196.Google Scholar

  • Nishi, M., Kato, T., Kubo, T., and Kikegawa, T. (2008) Survival of pyropic garnet in subducting plates. Physics of the Earth and Planetary Interiors, 170(3–4), 274–280.Google Scholar

  • Nishi, M., Kubo, T., Ohfuji, H., Kato, T., Nishihara, Y., and Irifune, T. (2013) Slow Si-Al interdiffusion in garnet and stagnation of subducting slabs. Earth and Planetary Science Letters, 361, 44–49. https://doi.org/10.1016/j.epsl.2012.11.022

  • Pacalo, R.E.G., and Gasparik, T. (1990) Reversals of the orthoenstatite-clinoenstatite transition at high pressures and high temperatures. Journal of Geophysical Research, 95(90).Google Scholar

  • Pakhomova, A., Ismailova, L., Bykova, E., Bykov, M., Boffa Ballaran, T., and Dubrovinsky, L. (2017) A new high-pressure phase transition in clinoferrosilite: In situ single-crystal X‑ray diffraction study. American Mineralogist, 102, 666–673.Google Scholar

  • Perdew, J.P., Burke, K., and Ernzerhof, M. (1996) Generalized gradient approximation made simple. Physical Review Letters, 77(18), 3865–3868. https://doi.org/10.1103/PhysRevLett.77.3865

  • Plonka, A.M., Dera, P., Irmen, P., Rivers, M.L., Ehm, L., and Parise, J.B. (2012) β-diopside, a new ultrahigh-pressure polymorph of CaMgSi2O6 with six-coordinated silicon. Geophysical Research Letters, 39, 2000–2003.Google Scholar

  • Poldervaart, A., and Hess, H.H. (1951) Pyroxenes in the crystallization of basaltic magma. The Journal of Geology, 59(5), 472–489.Google Scholar

  • Revenaugh, J., and Jordan, T.H. (1991) Mantle layering from ScS reverberations 3. The upper mantle. Journal of Geophysical Research, 96, 19781–19810.Google Scholar

  • Ringwood, A.E. (1976) Phase transformations in descending plates and implications for mantle dynamics. Tectonophysics, 32(1–2), 129–143. https://doi.org/10.1016/0040-1951(76)90089-5

  • Rivers, M.L., Prakapenka, V.B., Kubo, A., Pullins, C., Hall, C.M., and Jacobsen (2008) The COMPRES/GSECARS gas loading system for diamond anvil cells at the Advanced Photon Source. High Pressure Research, 28(3), 273–292.Google Scholar

  • Ross, N.L., and Reynard, B. (1999) The effect of iron on the P21/c to C2/c transition in (Mg,Fe)SiO3 clinopyroxenes. European Journal of Mineralogy, 11(3), 585–589.Google Scholar

  • Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.Google Scholar

  • Shinmei, T., Tomioka, N., Fujino, K., Kuroda, K., and Irifune, T. (1999) In situ X‑ray diffraction study of enstatite up to 12 GPa and 1473 K and equations of state. American Mineralogist, 84, 1588–1594.Google Scholar

  • Shiraki, K., Kuroda, N., Urano, H., and Maruyama, S. (1980) Clinoenstatite in boninites from the Bonin Islands, Japan. Nature, 285, 31–32.Google Scholar

  • Tribaudino, M., Prencipe, M., Bruno, M., and Levy, D. (2000) High-pressure behaviour of Ca-rich C2/c clinopyroxenes along the join diopside-enstatite (CaMgSi2O6-Mg2Si2O6 Physics and Chemistry of Minerals, 27(9), 656–664.Google Scholar

  • Tribaudino, M., Prencipe, M., Nestola, F., and Hanfland, M. (2001) A P21/c-C2/c high-pressure phase transition in Ca0.5Mg1.5Si2O6 clinopyroxene. American Mineralogist, 86, 807–813.Google Scholar

  • Ulmer, P., and Stalder, R. (2001) The Mg(Fe)SiO3 orthoenstatite-clinoenstatite transitions at high pressures and temperatures determined by Raman-spectroscopy on quenched samples. American Mineralogist, 86, 1267–1274.Google Scholar

  • Van Mierlo, W.L., Langenhorst, F., Frost, D.J., and Rubie, D.C. (2013) Stagnation of subducting slabs in the transition zone due to slow diffusion in majoritic garnet. Nature Geoscience, 6(5), 400–403. https://doi.org/10.1038/ngeo1772

  • Yu, Y.G., and Wentzcovitch, R.M. (2009) Low-pressure clino- to high-pressure clinoenstatite phase transition: A phonon-related mechanism. American Mineralogist, 94, 461–466. https://doi.org/10.2138/am.2009.3071

  • Zhang, L., Ahsbahs, H., Hafner, S.S., and Kutoglu, A. (1997) Single-crystal compression and crystal structure of clinopyroxene up to 10 GPa. American Mineralogist, 82, 245–258.Google Scholar

About the article

* Present address: Shock and Detonation Physics, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A


Received: 2018-07-19

Accepted: 2019-01-30

Published Online: 2019-05-27

Published in Print: 2019-06-26


Funding This research was supported through grants from U.S. National Science Foundation EAR-1452344 and EAR-1853521 to S.D.J. and EAR-1722969 to P.D. Support was also provided by the Capital/DOE Alliance Center (CDAC). Development of the ATREX software used for data analysis was supported by NSF grant EAR1440005. Portions of this work were performed at HPCAT (Sector 16) of the Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA under Award No. DE-NA0001974, with partial instrumentation funding by NSF. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. We thank Joshua Townsend for discussions and Sergey Tkachev for gas-loading diamond-anvil cells in the GSECARS gas-loading system, which is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR 1606856.


Citation Information: American Mineralogist, Volume 104, Issue 6, Pages 897–904, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am-2019-6740.

Export Citation

© 2019 Walter de Gruyter GmbH, Berlin/Boston.

Comments (0)

Please log in or register to comment.
Log in