Isothermal compression curve of MgSiO3 tetragonal garnet

Details Isothermal compression curve of MgSiO3 tetragonal garnet Isothermal compression curve of MgSiO3 tetragonal garnet

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...74....1y&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 74, Issue 1-2, p. 1-7.

Physics

25

Scientific paper

The bulk modulus of MgSiO3 tetragonal garnet was measured using a diamond anvil-type high-pressure apparatus combined with synchrotron radiation. An imaging plate X-ray detector was used to get high resolution diffraction data and the whole-powder-pattern decomposition method was employed to analyze the tetragonal unit cell which was only slightly distorted from cubic symmetry. The isothermal bulk modulus (K0) of the garnet-structured MgSiO3 was determined to be 161 GPa when (dK/dP)0 was assumed to be 4.
Combining this result with previous results, the compositional dependence of the bulk modulus of majorite in a pyrope-enstatite join is expressed as K0(GPa)=(171.8+/-3.5)-(0.11+/-0.5)XEn where XEn is the mole fraction of the enstatite composition in majorite.

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