Silicon coordination and speciation changes in a silicate liquid at high pressures

Xianyu Xue, Jonathan F. Stebbins, Masami Kanzaki, Reidar G. Trønnes

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

Coordination and local geometry around Si cations in silicate liquids are of primary importance in controlling the chemical and physical properties of magmas. Pressure-induced changes from fourfold to sixfold coordination of Si in silicate glass samples quenched from liquids has been detected with 29Si magic-angle spinning nuclear magnetic resonance spectrometry. Samples of Na2Si2O5 glass quenched from 8 gigapascals and 1500°C contained about 1.5 percent octahedral Si, which was demonstrably part of a homogeneous, amorphous phase. The dominant tetrahedral Si speciation in these glasses became disproportionated to a more random distribution of bridging and nonbridging oxygens with increasing pressure.

Original languageEnglish
Pages (from-to)962-964
Number of pages3
JournalScience
Volume245
Issue number4921
Publication statusPublished - 1989
Externally publishedYes

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silicates
glass
silicon
liquids
statistical distributions
chemical properties
metal spinning
physical properties
cations
nuclear magnetic resonance
oxygen
geometry
spectroscopy

ASJC Scopus subject areas

  • General

Cite this

Silicon coordination and speciation changes in a silicate liquid at high pressures. / Xue, Xianyu; Stebbins, Jonathan F.; Kanzaki, Masami; Trønnes, Reidar G.

In: Science, Vol. 245, No. 4921, 1989, p. 962-964.

Research output: Contribution to journalArticle

Xue, X, Stebbins, JF, Kanzaki, M & Trønnes, RG 1989, 'Silicon coordination and speciation changes in a silicate liquid at high pressures', Science, vol. 245, no. 4921, pp. 962-964.
Xue, Xianyu ; Stebbins, Jonathan F. ; Kanzaki, Masami ; Trønnes, Reidar G. / Silicon coordination and speciation changes in a silicate liquid at high pressures. In: Science. 1989 ; Vol. 245, No. 4921. pp. 962-964.
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