High-Pressure and High-Temperature in situ X-ray Diffraction Study of Natural Garnet(Mg_<0.72>Fe_<0.17>Ca_<0.11>)_3Al_2Si_3O_<12> up to 32 GPa and 2000 K Using MA8-Type Apparatus

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Breakdown reaction of natural garnet was studied by an in situ x-ray observation using an MA8-type multi-anvil apparatus up to about 32 GPa. Natural garnet with a composition (Mg<SUB>0. 72</SUB>Fe<SUB>0. l7</SUB>Ca<SUB>0. 11</SUB>) <SUB>3</SUB>Al<SUB>2</SUB>Si<SUB>3</SUB>O<SUB>12</SUB> breaks down at a pressure between 24 and 27 GPa to a mixture of sub-aluminous orthorhombic silicate perovskite, stishovite, Al-rich phase with unknown structure, and possibly CaSiO<SUB>3</SUB> perovskite. The unreacted garnet was observed even after heating the sample at 31. 7 GPa and 2000 K for 6000 sec. This result implies that the transition rate of the garnet is lower than that of Al-free system such as olivine and pyroxene.

収録刊行物

  • 高圧力の科学と技術 = The Review of high pressure science and technology

    高圧力の科学と技術 = The Review of high pressure science and technology 7, 59-61, 1998

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002688744
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4493835
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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