Thermoelastic properties of MgSiO(3)-perovskite: insights on the nature of the Earth's lower mantle.

@article{Wentzcovitch2004ThermoelasticPO,
  title={Thermoelastic properties of MgSiO(3)-perovskite: insights on the nature of the Earth's lower mantle.},
  author={Renata M. Wentzcovitch and Bijaya B. Karki and Matteo Cococcioni and Stefano de Gironcoli},
  journal={Physical review letters},
  year={2004},
  volume={92 1},
  pages={018501}
}
We have determined by means of first principles quasiharmonic calculations the elastic constants and acoustic velocities of MgSiO3 perovskite, the most abundant mineral of the Earth's lower mantle (LM), at pertinent pressures and temperatures. Using these results, along with the effects of low concentration iron alloying and the thermoelasticity of the most important secondary LM phase, MgO, we predict the isotropic elastic moduli of likely LM aggregates. Comparison with seismic values… CONTINUE READING