Electrical conductivity of enstatite up to 20 GPa and 1600K

Bao Hua Zhang, Xiao Ping Wu, Jun Shan Xu, Tomoo Katsura, Takashi Yoshino

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    The electrical conductivity of ( Mg0.9 Fe0.1 ) SiO3 enstatite has been measured at pressures of 10 -20 GPa and temperatures of 750-1600 K using a Kawai-type multianvil high-pressure apparatus. The experimental results demonstrate that there are two conduction mechanisms, small polaron is the dominant mechanism in the high temperature regions, while proton is in charge of the low temperature regions as water is determined in the recovered sample in this study. On the other hand, we observe a pressure induced phase transition from enstatite to ringwoodite under pressure of 20 GPa by X-ray diffraction. The conductivity of ringwoodite with water at 20 GPa is in good agreement with the available measurements of hydrous ringwoodite.

    Original languageEnglish
    Pages (from-to)760-764
    Number of pages5
    JournalActa Geophysica Sinica
    Volume53
    Issue number3
    DOIs
    Publication statusPublished - Mar 2010

    Keywords

    • Electrical conductivity
    • Enstatite
    • Proton
    • Small polaron

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology

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