Phase Transitions and Disordering of CaSiO_3 upon Compression

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We performed high pressure Raman measurements on the chain silicates CaSiO<SUB>3</SUB> (wollastonite), MgSiO<SUB>3</SUB> (enstatite) and CaMgSiO<SUB>3</SUB> (diopside). All three systems undergo SiO<SUB>4</SUB> to SiO<SUB>6</SUB> coordination changes at pressures exceeding 40 GPa and this change may be mediated by a monoclinic C2/c crystal symmetry that the solids adopt before the transition. Observed disordering behaviour in CaSiO<SUB>3</SUB> may be due to steric constraints caused by the larger calcium ions occupying both countercation sites and internal strains due to the volume change associated with the four to sixfold coordination change.

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, 359-361, 1998

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002690144
  • 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
    4493929
  • 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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