High-Pressure and High-Temperature in situ X-ray Diffraction Study of Natural Garnet(Mg0.72Fe0.17Ca0.11)3Al2Si3O12 up to 32GPa and 2000K Using MA8-Type Apparatus.

• Oguri K.

  Institute for Solid State Physics, University of Tokyo

• Funamori N.

  Institute for Solid State Physics, University of Tokyo

• Uchida T.

  Institute for Solid State Physics, University of Tokyo

• Yagi T.

  Institute for Solid State Physics, University of Tokyo

• Miyajima N.

  Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University

• Fujino K.

  Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University

Bibliographic Information

Other Title

• High-Pressure and High-Temperature in s

Abstract

Breakdown reaction of natural garnet was studied by an in situ x-ray observation using an MA8-type multi-anvil apparatus up to about 32 GPa. Natural garnet with a composition (Mg_{0. 72}Fe_{0. l7}Ca_{0. 11}) ₃Al₂Si₃O₁₂ breaks down at a pressure between 24 and 27 GPa to a mixture of sub-aluminous orthorhombic silicate perovskite, stishovite, Al-rich phase with unknown structure, and possibly CaSiO₃ perovskite. The unreacted garnet was observed even after heating the sample at 31. 7 GPa and 2000 K for 6000 sec. This result implies that the transition rate of the garnet is lower than that of Al-free system such as olivine and pyroxene.

Journal

• The Review of High Pressure Science and Technology

  The Review of High Pressure Science and Technology 7 59-61, 1998

  The Japan Society of High Pressure Science and Technology

Keywords

• natural garnet
• in situ x-ray observation
• MA8-type apparatus
• transition rate

Details

• CRID: 1390282679358190336
• NII Article ID: 10002688744
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.7.59
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 4493835
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4493835
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed