Local structure and chemical shifts for six-coordinated silicon in high-pressure mantle phases

Jonathan F. Stebbins, Masami Kanzaki

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Most of the earth's mantle is made up of high-pressure silicate minerals that contain octahedrally coordinated silicon (SiVI), but many thermodynamically important details of cation site ordering remain unknown. Silicon-29 nuclear magnetic resonance (NMR) spectroscopy is potentially very useful for determining short-range structure. A systematic study of silicon-29 chemical shifts for SiVI has revealed empirical correlations between shift and structure that are useful in understanding several new calcium silicates. The observed ordering state of a number of high-pressure magnesium silicates is consistent with the results of previous x-ray diffraction studies.

Original languageEnglish
Pages (from-to)294-298
Number of pages5
JournalScience
Volume251
Issue number4991
DOIs
Publication statusPublished - Jan 1 1991
Externally publishedYes

ASJC Scopus subject areas

  • General

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