The mechanism of solution of aluminum oxide in MgSiO<SUB>3</SUB> perovskite - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Geophysical Research Letters Year : 2001

The mechanism of solution of aluminum oxide in MgSiO3 perovskite

Jonathan F. Stebbins
  • Function : Author
Scott Kroeker
  • Function : Author

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.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2001 - Stebbins - The mechanism of solution of aluminum oxide in MgSiO3 perovskite.pdf (408.48 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03597766 , version 1 (04-03-2022)

Licence

Copyright

Identifiers

Cite

Jonathan F. Stebbins, Scott Kroeker, Denis Andrault. The mechanism of solution of aluminum oxide in MgSiO3 perovskite. Geophysical Research Letters, 2001, 28, pp.615-618. ⟨10.1029/2000GL012279⟩. ⟨insu-03597766⟩
7 View
17 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More