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Post-perovskite (pPv) is a high-pressure phase of magnesium silicate (MgSiO3). It is composed of the prime oxide constituents of the Earth's rocky mantle (MgO and SiO2), and its pressure and temperature for stability imply that it is likely to occur in portions of the lowermost few hundred km of Earth's mantle.
Classification of Post-perovskite
|IMA status:||Hypothetical Mineral|
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Crystallography of Post-perovskite
|Class (H-M):||mmm (2/m 2/m 2/m) - Dipyramidal|
|Space Group Setting:||Cmcm|
Chemical Properties of Post-perovskite
|Simplified for copy/paste:||MgSiO3|
|Essential elements:||Mg, O, Si|
|All elements listed in formula:||Mg, O, Si|
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Post-perovskite
Murakami, M., Hirose, K., Kawamura, K., Sata, N. and Ohishi, Y (2004) Post-Perovskite Phase Transition in MgSiO3. Science, 304, 855–8.
Oganov, A.R. and Ono, S. (2004) Theoretical and experimental evidence for a post-perovskite phase of MgSiO3 in Earth's D″ layer. Nature, 430, 445–8.
Iitaka, T., Hirose, K., Kawamura, K., Murakami, M. (2004) The elasticity of the MgSiO3 post-perovskite phase in the Earth's lowermost mantle. Nature, 430, 442–5.
Internet Links for Post-perovskite