Grain-boundary enrichment of iron on magnesium silicate perovskite
Grain-boundary enrichment of iron on magnesium silicate perovskite (in EMPG XI; Experimental mineralogy, petrology and geochemistry symposium, Jonathan D. Bundy (editor), Simon C. Kohn (editor) and Michael J. Walter (editor))
European Journal of Mineralogy (October 2007) 19 (5): 617-622
We present a combined experimental and numerical simulations study of grain boundaries in (Fe, Mg)SiO (sub 3) perovskite. TEM observations of grain boundaries in a well equilibrated perovskite sample consistently show small but significant enrichments of Fe. This result is in good agreement with classical potentials simulations of grain boundary structures in MgSiO (sub 3) perovskite which predict substitution of iron onto grain boundaries to be energetically favourable over iron substitution in the bulk perovskite structure.