Estimation of Accumulation of Chromium Ion Impurities in the CaSiO3 and MgSiO3 Phases of the Earth’s Lower Mantle at Pressures of 18–25 GPa

详细

Based on the data of atomic modeling, the different schemes of isomorphic incorporation of Cr³⁺ ions into the crystal structures of CaSiO₃ and MgSiO₃ were tested in the pressure range of 18–25 GPa and at temperatures of 1873–2223 K. Under these PT parameters, the content of Cr³⁺ in these structures was estimated quantitatively. The semi-empirical simulation data are in good agreement with the results of experiments.