High pressure shear moduli—A many body model for oxides

Amotz Agnon*, M. S.T. Bukowinski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We have constructed a parametric many‐body potential that gives accurate predictions of high pressure properties of alkali‐earth oxides. The model incorporates ionic deformational energy and a repulsive potential that are sensitive to the crystal environment. This feature is accomplished by an explicit dependence of the size of oxygen on the crystal potential. The parameters of the model are constrained by equation of state and zero pressure elastic constants of the B1 (NaCl) phases. The model predicts accurate B1‐B2 transition pressures and densities of the B2 (CsCl) phases. Elastic moduli are reproduced exactly, and accurate pressure derivatives are predicted.

Original languageAmerican English
Pages (from-to)209-212
Number of pages4
JournalGeophysical Research Letters
Volume15
Issue number3
DOIs
StatePublished - Mar 1988
Externally publishedYes

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