Generation of pressure to ∼60 GPa in Kawai-type apparatus and stability of MnGeO3 perovskite at high pressure and high temperature

Daisuke Yamazaki, Toru Shinmei, Toru Inoue, Tetsuo Irifune, Akifumi Nozawa, Kenichi Funakoshi

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Abstract

To obtain higher pressures in a Kawai-type apparatus, we explored and tested high-pressure cell assemblies suitable for experiments using sintered diamond (SD) anvils. As a result, we succeeded in generating pressures exceeding 55 GPa at temperatures of ∼1000 °C in a Kawai-type apparatus (SPEED Mk-II) at SPring-8. Using the optimized cell assembly, we examined the stability field of MnGeO3 perovskite, an analog Of MgSiO3 perovskite, which was recently found to transform to a new high-pressure form under the P-T conditions near the core-mantle boundary. From our in situ X-ray observations, MnGeO3 perovskite was found to be stable at pressures up to 56-57 GPa at temperatures of 800-1050°C.

Original languageEnglish
Pages (from-to)1342-1345
Number of pages4
JournalAmerican Mineralogist
Volume91
Issue number8-9
DOIs
Publication statusPublished - Aug 1 2006

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Keywords

  • High pressure and temperature
  • Manganese germanate
  • Perovskite
  • Pressure generation

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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