Over 1Mbar generation in the Kawai-type multianvil apparatus and its application to compression of (Mg0.92Fe0.08)SiO3 perovskite and stishovite

D. Yamazaki, E. Ito, T. Yoshino, N. Tsujino, A. Yoneda, X. Guo, F. Xu, Y. Higo, K. Funakoshi

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    45 Citations (Scopus)

    Abstract

    We generated pressures up to 109.3GPa in a Kawai-type multianvil apparatus (KMA) equipped with sintered diamond anvils by means of in situ X-ray observation with synchrotron radiation. The unit cell parameters of (Mg0.92Fe0.08)SiO3 perovskite, SiO2 stishovite, and the CaCl2-type polymorph of SiO2 were measured as functions of pressure. We determined the isothermal bulk modulus, KT0, and its pressure derivative, K0', at zero pressure, to be 268 (3)GPa and 3.8 (0.1), respectively, for (Mg0.92Fe0.08)SiO3 perovskite. Stishovite transforms to the CaCl2-type phase at approximately 54GPa at 300K. Compression through stishovite and the CaCl2-type phase can be represented by a single compression curve with KT0=299 (4)GPa and K0'=4.6(0.2).

    Original languageEnglish
    Pages (from-to)262-267
    Number of pages6
    JournalPhysics of the Earth and Planetary Interiors
    Volume228
    DOIs
    Publication statusPublished - Mar 2014

    Keywords

    • Kawai-type apparatus
    • Pressure generation

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Geophysics
    • Physics and Astronomy (miscellaneous)
    • Space and Planetary Science

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