Stability of fcc phase FeH to 137 GPa

DOI PDF 被引用文献11件 参考文献47件
  • Chie Kato
    Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan
  • Koichiro Umemoto
    Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan
  • Kenji Ohta
    Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan
  • Shoh Tagawa
    Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-0033, Japan
  • Kei Hirose
    Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan
  • Yasuo Ohishi
    Japan Synchrotron Radiation Research Institute, 1-1-1 Koto, Sayo, Hyogo, 679-5198, Japan

書誌事項

公開日
2020-06-01
資源種別
journal article
DOI
  • 10.2138/am-2020-7153
公開者
Mineralogical Society of America

この論文をさがす

説明

<jats:title>Abstract</jats:title> <jats:p>We examined the crystal structure of FeHX (X~1) (FeH hereafter) at high pressure and temperature by X-ray diffraction up to 137 GPa. Results show that FeH adopts a face-centered cubic (fcc) structure at pressures of 43 to 137 GPa and temperatures of ~1000 to 2000 K. Our study revises a phase diagram of stoichiometric FeH in which fcc has a wider-than-expected stability field at high pressure and temperature. Based on our findings, the FeH end-member of the Fe-FeH system is expected to be stable in the fcc structure at the P-T conditions of the Earth's core, rather than in the double-hexagonal close packed (dhcp) structure as previously reported. We compared the experimentally determined unit-cell volumes of FeH with those from ab initio calculations. Additionally, we observed a change in compressibility at ~60 GPa, which could be attributed to a magnetic transition—an interpretation supported by our ab initio computations.</jats:p>

収録刊行物

  • American Mineralogist

    American Mineralogist 105 (6), 917-921, 2020-06-01

    Mineralogical Society of America

被引用文献 (11)*注記

もっと見る

参考文献 (47)*注記

もっと見る

関連プロジェクト

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ