Clinoenstatite: High-Low Inversion

DOI Web Site 被引用文献6件
  • A. J. Perrotta
    Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois
  • D. A. Stephenson
    Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois

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<jats:p> Clinoenstatite undergoes a metastable displacive inversion at 995°C. The new phase can be indexed (from x-ray powder pattern) on a triclinic cell with dimensions <jats:italic>a</jats:italic> = 10.00 Å; <jats:italic>b</jats:italic> =8.934 Å; <jats:italic>c</jats:italic> = 5.170 Å; alpha = 88.27°; beta = 70.03°; gamma = 91.09°. The new phase persists from 995° to 1010°C at the composition MgSiO <jats:sub>3</jats:sub> . For a solid solution (15 percent by weight) of diopside in clinoenstatite, the new phase persists from 995° to at least 1400°C and does not invert in periods of several hours to protoenstatite, the phase previously thought to be the stable form in this region. </jats:p>

収録刊行物

  • Science

    Science 148 (3673), 1090-1091, 1965-05-21

    American Association for the Advancement of Science (AAAS)

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