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Post-perovskite

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Formula:
MgSiO3
Crystal System:
Orthorhombic
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.


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Classification of Post-perovskiteHide

Notes:
Intermediate member of a solid-solution series

Chemical Properties of Post-perovskiteHide

Formula:
MgSiO3

Crystallography of Post-perovskiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmcm
Setting:
Cmcm

Other InformationHide

Health Risks:
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-perovskiteHide

Reference List:
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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-perovskiteHide

Mineral and/or Locality  
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