Equation of state and shear strength at multimegabar pressures: Magnesium oxide to 227 GPa

Thomas S. Duffy, Russell J. Hemley, Ho Kwang Mao

Research output: Contribution to journalArticle

334 Scopus citations

Abstract

The equation of state, elasticity, and shear strength of magnesium oxide were examined to 227 GPa using synchrotron x-ray diffraction in a diamond anvil cell. Static compression, ultrasonic elasticity, and shock data for MgO from ambient pressure to above 200 GPa can all be described by a single Birch-Murnaghan equation of state when the static shear strength, which is determined to be at least 11 GPa at 227 GPa, is taken into account. Our results show that there are significant changes in the degree and character of the elastic anisotropy of MgO at high pressure.

Original languageEnglish (US)
Pages (from-to)1371-1374
Number of pages4
JournalPhysical review letters
Volume74
Issue number8
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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