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- W3127932566 abstract "Abstract The essential data for interior and thermal evolution models of the Earth and super-Earths are the density and melting of mantle silicate under extreme conditions. Here, we report an unprecedently high melting temperature of MgSiO 3 at 500 GPa by direct shockwave loading of pre-synthesized dense MgSiO 3 (bridgmanite) using the Z Pulsed Power Facility. We also present the first high-precision density data of crystalline MgSiO 3 to 422 GPa and 7200 K and of silicate melt to 1254 GPa. The experimental density measurements support our density functional theory based molecular dynamics calculations, providing benchmarks for theoretical calculations under extreme conditions. The excellent agreement between experiment and theory provides a reliable reference density profile for super-Earth mantles. Furthermore, the observed upper bound of melting temperature, 9430 K at 500 GPa, provides a critical constraint on the accretion energy required to melt the mantle and the prospect of driving a dynamo in massive rocky planets." @default.
- W3127932566 created "2021-02-15" @default.
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- W3127932566 date "2021-02-09" @default.
- W3127932566 modified "2023-10-11" @default.
- W3127932566 title "Melting and density of MgSiO3 determined by shock compression of bridgmanite to 1254GPa" @default.
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- W3127932566 doi "https://doi.org/10.1038/s41467-021-21170-y" @default.
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