MAS NMR spectroscopic study of Mg29SiO3 with the perovskite structure

R. J. Kirkpatrick, D. Howell, B. L. Phillips, Cong Xian-Dong Cong, E. Ito, A. Navrotsky

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17 Scopus citations

Abstract

A 29Si MAS NMR spectroscopic study of three samples of MgSiO3 perovskite with 95% isotopically enriched 29Si prepared at 24 GPa and 1800 °C shows the following. 1) There is only one 29Si peak, with a chemical shift of -191.7 ppm. 2) This peak is extremely narrow, with a Lorentzian shape and a full-width at half-height of 19-27 Hz (0.19-0.27 ppm). 3) The static peak shows no singularities attributable to chemical shift anisotropy (CSA). The peak breadth is probably substantially influenced by 29Si dipole-dipole interaction. These results demonstrate that MgSiO3 with the perovskite structure is extremely well ordered and that its Si coordination polyhedron is a very symmetrical octahedron. -from Authors

Original languageEnglish (US)
Pages (from-to)673-676
Number of pages4
JournalAmerican Mineralogist
Volume76
Issue number3-4
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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