Sound velocities of MgSiO3 perovskite and post-perovskite phase

Motohiko Murakami

Research output: Contribution to journalReview articlepeer-review

Abstract

Brillouin scattering measurements of the aggregate shear wave velocities in MgSiO3 perovskite and post-perovskite phase were conducted at high-pressure conditions relevant to the Earth's lowermost mantle. Infrared laser annealing of samples in a diamond anvil cell enabled to obtain high quality Brillouin spectra and to extend the upper limit of pressure of Brillouin measurements. The large pressure range over which acoustic measurements of MgSiO3 perovskite and post-perovskite phase were performed has thereby allowed us to put tighter constraints on compositional models of the Earth's lower mantle and enigmatic seismic observations in the lowermost mantle.

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume18
Issue number1
DOIs
Publication statusPublished - 2008

Keywords

  • Brillouin scattering spectroscopy
  • Elasticity
  • Lower mantle
  • Perovskite
  • Post-perovskite
  • Sound velocity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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