Oxide perovskites: Pressure derivatives of the bulk and shear moduli

Hui-Chen Kung, S. Rigden

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The pressure derivatives of elastic moduli (partial differentialM/ partial differentialP; M=K(s) and G) for a suite of polycrystalline oxide perovskites (2 titanates, 1 stannate and 2 aluminates) have been measured up to 3 GPa using the ultrasonic interferometry method combined with a buffer rod technique. Two empirical systematic relationships (partial differentialG/partial differentialP vs K(s)/G and partial differentialK(s)/partial differentialP vs K(s) (M/p)(1/3)) have been used to investigate the elasticity systematics of this suite of perovskites and to estimate partial differentialM/partial differentialP of MgSiO3 perovskite. The pressure derivatives partial differentialG/partial differentialP and partial differentialK(s)/partial differentialP for this suite of perovskites scatter between well-defined linear trends for the rutile, rocksalt and spinel structures. The more diffuse trends observed for the perovskites might reflect greater flexibility in the response of its corner-connected octahedral framework structure to changing pressure. The pressure derivatives of the elastic moduli for MgSiO3 perovskite estimated by the 'perovskite bands' are partial differentialG/partial differentialP=1.6-2.2 and partial differentialK(S)/partial differentialP=3.9-4.2.

Original languageEnglish
Pages (from-to)234-241
Number of pages8
JournalPhysics and Chemistry of Minerals
Volume26
Issue number3
DOIs
Publication statusPublished - 1999 Feb 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Geochemistry and Petrology

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