Abstract

The Mössbauer spectra of 57Fe in babingtonite were taken between 30 K and 600 K. Two doublets were observed and assigned to octahedral Fe2+ and Fe3+ in distinct crystallographic sites. Mn2+ appears to substitute for Fe2+. No evidence of delocalized electrons can be observed in the Mössbauer spectra even though the Fe2+ and Fe3+ oxygen octahedra share common edges in this structure. Quadrupole splittings and isomer shifts of both doublets reveal no great changes of the crystallographic and electronic structure between 30 and 600 K.

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