Ambient pressure M¿ssbauer spectra of Mg0.957Fe0.1SiO3 perovskite synthesized at pressure-temperature conditions of ~50 GPa and 1700 K show that the iron is entirely high-spin Fe2+ and appears to be primarily located in the octahedral site within the crystal structure. We observe broad M¿ssbauer lines, suggesting a distribution of electric field gradients caused by disorder associated with the Fe ions. Also, the perovskite exhibits magnetic ordering at temperatures <5 K, implying that there is a magnetic contribution to the absolute (''third-law'') entropy of this phase. ¿ American Geophysical Union 1992