Elasticity of single-crystal quartz to 10 GPa

Jue Wang, Zhu Mao, Fuming Jiang, Thomas S. Duffy

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The second-order elastic constants of quartz were determined by Brillouin spectroscopy to 10 GPa in a diamond anvil cell. All elastic constants exhibit smooth pressure trends. A decrease in the magnitudes of C14 and C66 with pressure is observed, while C44 shows a weak pressure dependence. Our measured elastic constants are more consistent with previous density functional theory calculations than with earlier experimental results. Aggregate elastic moduli were calculated and fit to a finite-strain equation of state, yielding values for the pressure derivatives of the adiabatic bulk modulus, K0Sʹ, and shear modulus, G0ʹ, of α-quartz of 6.2(2) and 0.9(1), respectively. The equation of state obtained from our data is consistent with static X-ray diffraction data. A finite-strain extrapolation of our data predicts a violation of a Born stability criterion, indicating a mechanical instability in the structure, at ~26 GPa which is broadly consistent with the pressure range at which a phase transition and pressure-induced amorphization in quartz are observed.

Original languageEnglish (US)
Pages (from-to)203-212
Number of pages10
JournalPhysics and Chemistry of Minerals
Volume42
Issue number3
DOIs
StatePublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Geochemistry and Petrology

Keywords

  • Elasticity
  • High pressure
  • Quartz

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