Abstract
The Mossbauer spectrum of 57Co diffused into MnFe2O4 showed that the 57Co ion occupied only the B site . The contact charge density of the 4s electrons in the Fe3+ ion surrounded octahedrally by the O2- ion was measured from an internal conversion experiment. The obtained value is 3.95 ± 0.65 a.u., being smaller than that in NiO and a comparison with the predicted values is given.
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