In situ X ray observation of high-pressure phase transitions of MgSiO3 and thermal expansion of MgSiO3 perovskite at 25 GPa by double-stage multianvil system

Takumi Kato, Eiji Ohtani, Hideaki Morishima, Daisuke Yamazaki, Akio Suzuki, Minoru Suto, Tomoaki Kubo, Takumi Kikegawa, Osamu Shimomura

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Abstract

A double-stage multianvil system was developed to conduct in situ X ray diffraction study at high pressures. The system has been used in conjunction with intense synchrotron radiation to study the phase transitions of MgSiO3 and the thermal expansion of MgSiO3 perovskite. At pressures between 20 and 30 GPa, a series of phase transitions from spinel+stishovite through ilmenite to perovskite were observed. The results provide the phase stability relation of MgSiO3 and the thermal equation of state of MgSiO3 perovskite at pressures corresponding to the boundary between the upper and lower mantle. -from Authors

Original languageEnglish
Pages (from-to)20,475-20,481
JournalJournal of Geophysical Research
Volume100
Issue numberB10
Publication statusPublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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    Kato, T., Ohtani, E., Morishima, H., Yamazaki, D., Suzuki, A., Suto, M., Kubo, T., Kikegawa, T., & Shimomura, O. (1995). In situ X ray observation of high-pressure phase transitions of MgSiO3 and thermal expansion of MgSiO3 perovskite at 25 GPa by double-stage multianvil system. Journal of Geophysical Research, 100(B10), 20,475-20,481.