Abstract
A high-pressure phase transition in iron free MgSiO3 perovskite, the most abundant Earth forming mineral phase, was discovered and reported in 2003-2004. Here, we summarize our theoretical and computational studies on this phase transition and on the physical properties of the newly found post-perovskite phase. The theoretical approach is based on density functional theory and on the plane-wave pseudopotential method. We focus here on the structural, elastic, vibrational, and thermodynamic properties of the post-perovskite phase. The predicted Clapeyron slope of this transition and several elastic properties of the highpressure phase strongly suggest that this new phase is an important candidate for a primary constituent in D″.
Original language | English (US) |
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Title of host publication | Superplumes |
Subtitle of host publication | Beyond Plate Tectonics |
Publisher | Springer Netherlands |
Pages | 83-103 |
Number of pages | 21 |
ISBN (Print) | 9781402057496 |
DOIs | |
State | Published - Dec 1 2007 |