Pressure-induced changes in the compression mechanism of aluminous perovskite in the Earth's mantle

Article Abstract:

Research is presented concerning the nature of aluminous perovskites and whether oxygen vacancies exist within them. The different physical properties of perovskites with and without oxygen vacancies are discussed.

Analysis, Aluminum, Aluminum (Metal), Letter to the Editor, Seismological research

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The elastic constants of MgSiO3 perovskite at pressures and temperatures of the Earth's mantle

Article Abstract:

Finite-temperature ab initio molecular dynamics simulations of the elastic properties of MgSiO3 perovskite are presented. It was established that the temperature constant between the coldest and hottest regions of the mantle was around 800 K at 1,000 km, rising to possibly more than 2,000 K at the core-mantle boundary.

Earth, Core (Geology)

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Theoretical and experimental evidence for a post-perovskite phase of MgSiO3 in Earth's D" layer

Article Abstract:

Ab initio simulations and high-pressure experiments are used to transform MgSiO3 from a perovskite to a post perovskite phase. The elastic properties of the post-perovskite phase and its stability layer are further used to explain several properties of the D" layer.

United States, Science & research, Geological research, Mantle (Geology)

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