High-temperature phase transitions and elasticity of silica polymorphs

Dmitry L. Lakshtanov, Stanislav V. Sinogeikin, Jay D. Bass

Research output: Contribution to journalArticle

Abstract

The single-crystal acoustic velocities of α- and β-quartz were measured by Brillouin spectroscopy to a maximum temperature >1,500°C at room pressure. From these velocities, the single-crystal elastic moduli were calculated up to 1,050°C, exceeding the temperature range of previous measurements by 350°C for the elastic moduli and by 710°C for acoustic velocities. The ordinary refractive index (no) of α- and β-quartz was measured from room temperature to 800°C. In the temperature interval from ∼950 to 1,000°C a subtle change in the temperature derivative of the longitudinal acoustic velocity was observed in platelet geometry for all measured directions. The high-temperature acoustic velocity data may indicate the presence of a second phase, presumably β-cristobalite, that nucleates below 1,000°C.

Original languageEnglish (US)
Pages (from-to)11-22
Number of pages12
JournalPhysics and Chemistry of Minerals
Volume34
Issue number1
DOIs
StatePublished - Jan 1 2007

Fingerprint

phase transition
Polymorphism
Silicon Dioxide
elasticity
Elasticity
silica
Phase transitions
Silica
Acoustic wave velocity
acoustics
elastic modulus
Quartz
temperature
Temperature
crystal
quartz
Elastic moduli
cristobalite
Single crystals
refractive index

Keywords

  • Brillouin scattering
  • Cristobalite
  • Elastic constants
  • High temperature
  • Phase transitions
  • Quartz

ASJC Scopus subject areas

  • Materials Science(all)
  • Geochemistry and Petrology

Cite this

High-temperature phase transitions and elasticity of silica polymorphs. / Lakshtanov, Dmitry L.; Sinogeikin, Stanislav V.; Bass, Jay D.

In: Physics and Chemistry of Minerals, Vol. 34, No. 1, 01.01.2007, p. 11-22.

Research output: Contribution to journalArticle

Lakshtanov, Dmitry L. ; Sinogeikin, Stanislav V. ; Bass, Jay D. / High-temperature phase transitions and elasticity of silica polymorphs. In: Physics and Chemistry of Minerals. 2007 ; Vol. 34, No. 1. pp. 11-22.
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