Abstract
Crystal field theory in conjunction with spectroscopic data may be applied to give quantitatively the d-shell splitting and the resulting stabilization of a transition metal ion in a crystal site of given symmetry. The thermodynamic stabilization values are found for both octahedral and tetrahedral sites in the spinel lattice. The differences between these values is the site preference energy. The cation distributions predicted from this energy are in good agreement with known experimental data. The occurrence of a large Jahn-Teller effect is correlated with tetragonal phase formation.
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