Stackhouse, S;
Brodholt, JP;
Price, GD;
(2005)
High temperature elastic anisotropy of the perovskite and post-perovskite polymorphs of Al2O3.
Geophysical Research Letters
, 32
(13)
, Article L13305. 10.1029/2005GL023163.
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Abstract
Finite temperature ab initio molecular dynamics calculations were performed to determine the high temperature elastic and seismic properties of the perovskite and post-perovskite phases of pure end-member Al2O3. The post-perovskite phase exhibits very large degrees of shear-wave splitting. The incorporation of a few mole percent of Al2O3 into MgSiO3 is predicted to have little effect on the perovskite to post-perovskite phase transition pressure and seismic properties of the post-perovskite phase; although a small difference in shear-wave splitting may be observable.
| Type: | Article |
|---|---|
| Title: | High temperature elastic anisotropy of the perovskite and post-perovskite polymorphs of Al2O3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2005GL023163 |
| Publisher version: | http://dx.doi.org/10.1029/2005GL023163 |
| Language: | English |
| Additional information: | Copyright 2005 by the American Geophysical Union |
| Keywords: | Augmented-wave method, Earth's lower mantle, Mgsio3 perovskite, Seismic anisotropy, Lowermost mantle, Phase-transition, D''-layer, Discontinuity, Mechanism, Base |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/240213 |
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