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The Mössbauer isomer shift in iron (III) sulfate

1977; American Institute of Physics; Volume: 67; Issue: 6 Linguagem: Inglês

10.1063/1.435148

1520-9032

Y. Haven, Ronald E. Noftle,

Crystal Structures and Properties

The Mössbauer spectra of the rhombohedral and monoclinic modifications of Fe(III) sulfate have been measured. The isomer shift is 0.496 mm s−1 relative to α-Fe for both modifications and the quadrupole splittings are 0.15 and 0.30 mm s−1, respectively. The isomer shift of Fe2(SO4)3 fits on a calibration curve of electron density versus isomer shift proposed by Barrett and Micklitz, and its position is consistent with a high degree of ionic character for the compound. It is proposed to include Fe2(SO4)3 as one of the calibration points for electron density versus isomer shift.