Pressure-Induced Phase Transitions of KTiOAsO_4 by Raman Spectroscopy

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Potassium titanyl orthoarsenate KTiOAsO<SUB>4</SUB> has been studied by Raman spectroscopy up to 16 GPa. Three first-order pressure-induced phase transitions are inferred from Raman data. The first phase transition takes place at 3. 2 GPa, as indicated by drastic spectral changes in all the internal modes of the TiO<SUB>6</SUB> octahedra. The second phase transition occurs at 7. 5 GPa with striking spectral changes in the high wavenumber region for Raman modes involving both TiO<SUB>6</SUB> and AsO<SUB>4</SUB> groups. Several modes belonging to TiO<SUB>6</SUB> also soften between 0-7. 5 GPa. The third phase transition occurs near 10 GPa and the high-pressure phase should be of higher symmetry.

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, 748-750, 1998

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002691714
  • 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
    4494043
  • 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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