Tetrahedral rigid-body motion in silicates

K. L. Bartelmehs, Robert T Downs, G. V. Gibbs, M. B. Boisen, J. B. Birch

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The atomic displacement parameters (ADPs) obtained from published refinements of silicate crystals measured at or below room temperature are examined to determine if TO4 (T = Al,Si) tetrahedra display rigid-body thermal motion. In many cases, the correlation found among the ADPs is consistent with the TLS model of rigid-body motion. The libration angle for rigid tetrahedra is quadratically dependent on the difference between the isotropic equivalent displacement parameter of the T and O atoms, Beq(T) and Beq(O), respectively. The value of Beq(O) is on average twice that of Beq(T), with an observed maximum value of ~2.0 Å3. -from Authors

Original languageEnglish (US)
Pages (from-to)680-690
Number of pages11
JournalAmerican Mineralogist
Volume80
Issue number7-8
StatePublished - 1995
Externally publishedYes

Fingerprint

Silicates
rigid structures
silicates
silicate
Display devices
tetrahedrons
Atoms
Crystals
libration
Temperature
crystal
room temperature
crystals
atoms
Hot Temperature
parameter
temperature

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Bartelmehs, K. L., Downs, R. T., Gibbs, G. V., Boisen, M. B., & Birch, J. B. (1995). Tetrahedral rigid-body motion in silicates. American Mineralogist, 80(7-8), 680-690.

Tetrahedral rigid-body motion in silicates. / Bartelmehs, K. L.; Downs, Robert T; Gibbs, G. V.; Boisen, M. B.; Birch, J. B.

In: American Mineralogist, Vol. 80, No. 7-8, 1995, p. 680-690.

Research output: Contribution to journalArticle

Bartelmehs, KL, Downs, RT, Gibbs, GV, Boisen, MB & Birch, JB 1995, 'Tetrahedral rigid-body motion in silicates', American Mineralogist, vol. 80, no. 7-8, pp. 680-690.
Bartelmehs KL, Downs RT, Gibbs GV, Boisen MB, Birch JB. Tetrahedral rigid-body motion in silicates. American Mineralogist. 1995;80(7-8):680-690.
Bartelmehs, K. L. ; Downs, Robert T ; Gibbs, G. V. ; Boisen, M. B. ; Birch, J. B. / Tetrahedral rigid-body motion in silicates. In: American Mineralogist. 1995 ; Vol. 80, No. 7-8. pp. 680-690.
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