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Hydrostatic Compression of Perovskite Phase of SrGeO3

  • Y. Sato
  • S. Akimoto

Abstract

Phase transformations of orthosilicates and metasilicates have been studied extensively under high pressures and temperatures for a better understanding of the earth’s interior. Recent investigations have established that forsterite, the atmospheric phase of magnesium orthosilicate (Mg2SiO4) with an olivine structure, transforms at very high pressures to a mixture of MgSiO3 (perovskite) plus periclase (Mg0) through the intermediate β- and spinel phases [1,2]. Enstatite, the atmospheric phase of magnesium metasilicate (MgSiO3) with the pyroxene structure, also transforms at very high pressures into the perovskite phase through the intermediate ilmenite phase [2,3]. Anderson [4] has compared laboratory elastic moduli data of silicates and oxides with seismic data and inferred that the lower mantle deeper than 800 km is consistent with the mixture of perovskite and MgO.

Keywords

Bulk Modulus Diffraction Line Perovskite Phase Lower Mantle Pressure Scale 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • Y. Sato
    • 1
    • 2
  • S. Akimoto
    • 3
  1. 1.University of California at Los AngelesLos AngelesUSA
  2. 2.Meteorological CollegeAsahi-cho, Kashiwa-shiJapan
  3. 3.The University of TokyoTokyoJapan

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