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Nishio-Hamane et al. 2005

Nishio-Hamane, D., Nagai, T., Fujino, K., Seto, Y. and Takafuji, N. (2005). Fe³⁺ and Al solubilities in MgSiO₃ perovskite: implication of the Fe³⁺AlO₃ substitution in MgSiO₃ perovskite at the lower mantle condition. Geophysical Research Letters 32: doi: 10.1029/2005GL023529. issn: 0094-8276.

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.

BACKGROUND DATA FILES

	Abstract

Keywords
Mineralogy and Petrology, Mineral and crystal chemistry, Mineralogy and Petrology, Experimental mineralogy and petrology, Mineral Physics, High-pressure behavior, Mineral Physics, X-ray, neutron, and electron spectroscopy and diffraction

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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