Journal articles
The mechanism of solution of aluminum oxide in MgSiO3 perovskite
Abstract : 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.
https://hal-insu.archives-ouvertes.fr/insu-03597766
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Submitted on : Friday, March 4, 2022 - 4:41:07 PM
Last modification on : Sunday, March 6, 2022 - 3:23:53 AM
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, March 4, 2022 - 4:41:07 PM
Last modification on : Sunday, March 6, 2022 - 3:23:53 AM
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Geophysical Research Letters -...
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