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Chinese Journal of High Pressure Physics  > 1999  >  13(2): 127-132 .
HUO Hui, GONG Zi-Zheng, JING Fu-Qian. High-Pressure Phase State of Enstatite and Its Application in Geophysics[J]. Chinese Journal of High Pressure Physics, 1999, 13(2): 127-132 . doi: 10.11858/gywlxb.1999.02.008
Citation: HUO Hui, GONG Zi-Zheng, JING Fu-Qian. High-Pressure Phase State of Enstatite and Its Application in Geophysics[J]. Chinese Journal of High Pressure Physics, 1999, 13(2): 127-132 . doi: 10.11858/gywlxb.1999.02.008
shu

High-Pressure Phase State of Enstatite and Its Application in Geophysics

doi: 10.11858/gywlxb.1999.02.008
  • 1.

    Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Chengdu 610003, China;

  • 2.

    Department of Machtronic Engineering, Beijing Institute of Technology, Beijing 100081, China;

  • 3.

    Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

More Information
  • Corresponding author: HUO Hui
  • Received Date: 30 Jan 1999
  • Rev Recd Date: 15 Mar 1999
  • Issue Publish Date: 05 Jun 1999
    Abstract
  • By using Birch-Murnaghan and Grneisen equation of state, Hugoniots of both perovskite Mg0.86Fe0.14SiO3 and the mixture of magnesiow stite (Mg0.86Fe0.14O) and stishovite (SiO2) have been calculated in this work. When compared with experimental Hugoniots, the calculations demonstrate that the above mentioned two kinds of phase states are indeed possibly the high-pressure phases of enstatite when it is compressed to high pressure but to different temperatures. Besides, we further made corrections on the effect of temperature-difference due to Hugoniot and PREM estimations to deduce the density values relevant to lower mantle and found that Mg0.86Fe0.14SiO3 is more likely to be the main composition or phase state of the lower mantle. It shows an additional support to the opinion proposed by Knittle et al.

     

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