منابع مشابه
Elasticity of post-perovskite MgSiO3
[1] We have determined by first principles the athermal elastic constant tensor, single crystal and aggregated acoustic velocities, and anisotropy of the recently discovered post-perovskite MgSiO3 polymorph. This phase may be the most abundant mineral in the D00 region. We find that the post-perovskite phase has similar bulk modulus and larger shear modulus than perovskite at relevant pressures...
متن کاملAb initio investigation of perovskite and post-perovskite CaPtO3
For the recently synthesized post-perovskite (PPV) CaPtO3 we investigate the electronic band structure properties in connection with hypothetical perovskite PV–CaPtO3 within density functional theory using pseudopotential and all electron methods. Both systems are found insulating in agreement with a tetravalent Pt(IV) low spin d6 state. The equilibrium values of the volume and energy point to ...
متن کاملPost-perovskite Transition in Anti-structure
The discovery of the post-perovskite transition, which is the structural transition from the perovskite to post-perovskite structure in MgSiO3 under pressure, has aroused great interests in geosciences. Despite of previous extensive studies, key factors of the post-perovsktie transition are still under hot debate primarily due to the big difficulty in performing systematic experiments under ext...
متن کاملSuperconductivity in anti-post-perovskite vanadium compounds
Superconductivity, which is a quantum state induced by spontaneous gauge symmetry breaking, frequently emerges in low-dimensional materials. Hence, low dimensionality has long been considered as necessary to achieve high superconducting transition temperatures (TC). The recently discovered post-perovskite (ppv) MgSiO3, which constitutes the Earth's lowermost mantle (D" layer), has attracted sig...
متن کاملTwo-stage dissociation in MgSiO3 post-perovskite
a r t i c l e i n f o Keywords: pressure-induced phase transition postperovskite super-Earth 10 solar giants first principles The fate of MgSiO 3 post-perovskite under TPa pressures is key information for understanding and modeling interiors of super-Earths-type exoplanets and solar giants' cores. Here, we report a dissociation of MgSiO 3 post-perovskite into CsCl-type MgO and P2 1 /c-type MgSi...
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ژورنال
عنوان ژورنال: Journal of Solid State Chemistry
سال: 2011
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2011.01.028