Phase boundary between perovskite and post-perovskite structures in MnGeO3 determined by in situ X-ray diffraction measurements using sintered diamond anvils

Daisuke Yamazaki, Eiji Ito, Tomoo Katsura, Takashi Yoshino, Shuangmeng Zhai, Hiroshi Fukui, Anton Shatskiy, Xinzhuan Guo, Shuangming Shan, Takuo Okuchi, Yoshinori Tange, Yuji Higo, Ken Ichi Funakoshi

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    To determine the phase boundary between the perovskite and post-perovskite structures in MnGeO3, in situ X-ray observations were carried out at pressures of 57-68 GPa and temperatures of 1000-1900 K using the Kawai-type high-pressure apparatus equipped with sintered diamond anvils interfaced with synchrotron radiation. The phase boundary was determined to be P (GPa) = 39.2 + 0.013T (K) based on Tsuchiya's (2003) gold pressure scale. The Clapeyron slope, dP/dT, of 13(+12/-5) MPa/K, determined in the present study is larger that of MgGeO3 and MgSiO3.

    Original languageEnglish
    Pages (from-to)89-92
    Number of pages4
    JournalAmerican Mineralogist
    Volume96
    Issue number1
    DOIs
    Publication statusPublished - Jan 2011

    Keywords

    • High pressure
    • In situ X-ray observation
    • Phase boundary
    • Post-perovskite

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology

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