Abstract
Variations of Raman spectra of MgSiO3·10% Al2O3-perovskite were investigated up to about 270 kbar at room temperature and in the range 108–425 °K at atmospheric pressure. Like MgSiO3-perovskite, the Raman frequencies of MgSiO3·10% Al2O3-perovskite increase nonlinearly with increasing pressure and decrease linearly with increasing temperature within the experimental uncertainties and the range investigated. A comparison of these data with those of MgSiO3-perovskite suggests that MgSiO3·10% Al2O3-perovskite is slightly more compressible than MgSiO3-perovskite, and that the volume thermal expansion for MgSiO3·10% Al2O3-perovskite is also slightly greater than that for MgSiO3-perovskite.
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Liu, Lg., Mernagh, T.P. & Irifune, T. Raman spectra of MgSiO3·10% Al2O3-perovskite at various pressures and temperatures. Phys Chem Minerals 22, 511–516 (1995). https://doi.org/10.1007/BF00209377
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DOI: https://doi.org/10.1007/BF00209377