Variations of bond lengths and volumes of silicate tetrahedra with temperature

R. T. Downs, G. V. Gibbs, K. L. Bartelmehs, M. B. Boisen

Research output: Contribution to journalArticle

93 Scopus citations

Abstract

The apparent SiO bond lengths recorded for silicates over a range of temperatures either typically are invariant or exhibit a contraction with increasing temperature. A rigid-body thermal analysis was completed for the tetrahedra in nine silicates whose structures have been determined over a range of temperatures from 15 to 1250 K and whose tetrahedra seem to behave as rigid units. The bond lengths and volumes estimated for tetrahedra with four bridging O atoms seem to increase with temperature at a faster rate than those with four nonbridging O atoms. Those for tetrahedra with two or three nonbridging O atoms tend to increase an an intermediate rate. -from Authors

Original languageEnglish (US)
Pages (from-to)751-757
Number of pages7
JournalAmerican Mineralogist
Volume77
Issue number7-8
StatePublished - Jan 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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