Actas de congresos
Ab initio calculation of aluminum impurities in MgSiO3 under pressure.
Fecha
2013-09-29Registro en:
Encontro da SBPMat, XII, 2013, Campos do Jordão.
Autor
Mamani, Rolando Larico
Assali, Lucy Vitoria Credidio
Justo Filho, Joao Francisco
Institución
Resumen
Ferrosilicate perovskite (Mg,Fe)SiO3 is the most abundant minerals in the Earth’s lower
mantle, containing high concentration of iron. The study of properties of this material
under high pressures and high temperatures allowed, in the last decade, to understand several
properties of the lower mantle.
Most of the known information on the Earth´s lower mantle is obtained indirectly, using
information from seismic wave propagation across the mantle or high pressure experiments.
Measurements on seismic waves help to understand the density and elastic properties of the
mantle, but the challenge is to use such information to identify the precise chemical
composition of the mantle.