Pressure-induced amorphization of Mg_2GeO_4-olivine

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Author(s)

    • NAGAI Takaya
    • Department of Earth and Space Science, Faculty of Science, Osaka University
    • YANO Koichi
    • Department of Solid State Physics, Faculty of Engineering Science, Osaka University
    • DEJIMA Masami
    • Department of Solid State Physics, Faculty of Engineering Science, Osaka University

Abstract

<I>In-situ</I> X-ray diffraction measurements were conducted for Mg<SUB>2</SUB>GeO<SUB>4</SUB>-olivine under high pressure at room temperature by using a diamond anvil cell(DAC) and a synchrotron radiation source in the National Institute for High Energy Physics as well as a conventional laboratory X-ray source, in order to clarify the possibility of a pressure-induced amorphization. The isothermal bulk modulus K<SUB>0</SUB>=70(±5)GPa is obtained. The Mg<SUB>2</SUB>GeO<SUB>4</SUB>-olivine transforms to ‘X-ray amorphous state’ below 30GPa and the amorphous state is preserved during the decompression process to 0.1 MPa. The local structural instability caused by the change of the coordination of Ge atoms is likely to lead to the pressure-induced amorphization.

Journal

  • Mineralogical Journal

    Mineralogical Journal 17(4), 151-157, 1994-10-01

    Japan Association of Mineralogical Sciences

References:  16

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008771041
  • NII NACSIS-CAT ID (NCID)
    AA00739590
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    05442540
  • Data Source
    CJP  CJPref  J-STAGE 
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