Single crystal elasticity of lawsonite

S. V. Sinogeikin, F. R. Schilling, J. D. Bass

Research output: Contribution to journalArticlepeer-review

Abstract

The single-crystal elastic moduli of lawsonite [CaAl2(Si2O7)(OH)2̇H2 O] were measured by Brillouin spectroscopy at ambient conditions. The Voigt-Reuss-Hill averaged aggregate elastic moduli are KS = 125(2) GPa and μ = 52(2) GPa, for the adiabatic bulk modulus and shear modulus, respectively. Our acoustic results resolve discrepancies between the bulk moduli obtained in earlier compression studies. Lawsonite has distinctive acoustic properties, being characterized by extremely high shear elastic anisotropy (74%), a high VP to VS ratio (VP/VS = 1.94), and a large Poisson's ratio (σ = 0.318).

Original languageEnglish (US)
Pages (from-to)1834-1837
Number of pages4
JournalAmerican Mineralogist
Volume85
Issue number11-12
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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