Modeling defects and plasticity in MgSiO3 post-perovskite: Part 1—generalized stacking faults
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چکیده
منابع مشابه
Modeling defects and plasticity in MgSiO3 post-perovskite: Part 1-generalized stacking faults.
In this work, we examine the transferability of a pairwise potential model (derived for MgSiO3 perovskite) to accurately compute the excess energies of the generalized stacking faults (GSF, also called γ-surfaces) in MgSiO3 post-perovskite. All calculations have been performed at 120 GPa, a pressure relevant to the D″ layer. Taking into account an important aspect of crystal chemistry for compl...
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In situ x-ray diffraction measurements of MgSiO3 were performed at high pressure and temperature similar to the conditions at Earth's core-mantle boundary. Results demonstrate that MgSiO3 perovskite transforms to a new high-pressure form with stacked SiO6-octahedral sheet structure above 125 gigapascals and 2500 kelvin (2700-kilometer depth near the base of the mantle) with an increase in densi...
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ژورنال
عنوان ژورنال: Physics and Chemistry of Minerals
سال: 2015
ISSN: 0342-1791,1432-2021
DOI: 10.1007/s00269-015-0762-9