Fe3+ and Al solubilities in MgSiO3 perovskite: implication of the Fe3+AlO3 substitution in MgSiO3 perovskite at the lower mantle condition

Details Fe3+ and Al solubilities in MgSiO3 perovskite: implication of the Fe3+AlO3 substitution in MgSiO3 perovskite at the lower mantle condition Fe3+ and Al solubilities in MgSiO3 perovskite: implication of the Fe3+AlO3 substitution in MgSiO3 perovskite at the lower mantle condition

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3216306n&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 16, CiteID L16306

Physics

13

Mineralogy And Petrology: Mineral And Crystal Chemistry (1042), Mineralogy And Petrology: Experimental Mineralogy And Petrology, Mineral Physics: High-Pressure Behavior, Mineral Physics: X-Ray, Neutron, And Electron Spectroscopy And Diffraction

Scientific paper

Perovskite in the starting composition of Mg3Fe3+AlSi3O12 was investigated at 24 and 51 GPa and 2100 K using a laser-heated diamond anvil cell (LHDAC) and an analytical transmission electron microscopy (ATEM) to understand the solubilities of Fe3+ and Al into MgSiO3-dominated perovskite. A single phase of orthorhombic perovskite was formed at 51 GPa and 2100 K and the Fe3+AlO3 bearing perovskite showed no structural change during decompression. The samples synthesized at 24 GPa and 2100 K showed minor amounts of magnesioferrite and stishovite phases in spaces along the perovskite grain boundaries. These results indicate that the solubility of ferric iron incorporated as the Fe3+AlO3 component in MgSiO3-based perovskite is higher and slightly lower than 25 mole % at 51 and 24 GPa, respectively.

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