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Large magnetic moments were observed in the cubic spinel oxides Ge x Zn 1- x Fe 2 O 4 (0< x <1). Lattice constant of this system deviates from the Vegard's law. Intensity analysis of X-ray powder diffraction indicates that approximately 30% of A site are occupied by magnetic ions in the case x =0.5. Ion distribution of the whole system is proposed which can explain the x dependence of the magnetic moment and the lattice constant. The distribution is shown to be reasonable from a view point of electric charge neutrality in a cluster of several cations and anions.
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Miyahara et al. (1976) studied this question.
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