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Stebbins et al. 2001

Stebbins, J.F., Kroeker, S. and Andrault, D. (2001). The mechanism of solution of aluminum oxide in MgSiO₃ perovskite. Geophysical Research Letters 28: doi: 10.1029/2000GL012279. issn: 0094-8276.

We report 27Al and 29Si Nuclear Magnetic Resonance (NMR) spectra, collected at magnetic fields of 14.1 and 18.8 Tesla on samples as small as 1 mg, for Al-bearing MgSiO3 perovskite synthesized at 26--28 GPa. For Al, we find a 1:1 ratio of two types of sites: a symmetrical, octahedral site and a low symmetry, distorted site that is most likely to be Al in modifications of normally eight-coordinated Mg sites. A charge coupled substitution of 2 Al for one Si and one Mg cation is strongly supported as the predominant mechanism in this pressure range. ¿ 2001 American Geophysical Union

BACKGROUND DATA FILES

	Abstract

Keywords
Mineralogy and Petrology, Crystal chemistry, Mineralogy and Petrology, Experimental mineralogy and petrology, Mineral Physics, High-pressure behavior, Mineral Physics, NMR, Mossbauer spectroscopy, and other magnetic techniques

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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