Abstract
We have studied the cation distribution over the tetrahedral and octahedral sites in the spinel structure of nanocrystalline Ni x Zn1 − x Fe2O4 ferrites prepared by spray pyrolysis. 57Fe Mössbauer spectroscopy data for the ferrites demonstrate that, depending on the composition of the materials, the tetrahedral site may accommodate only Fe3+ (inverse spinel, x ≥ 0.4) or both Fe3+ and Zn2+ cations (mixed spinel, x = 0 and 0.2), which accounts for the fact that the composition dependence of the unit-cell parameter for the ferrites deviates from Vegard’s law.
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Original Russian Text © A.P. Kazin, M.N. Rumyantseva, V.E. Prusakov, I.P. Suzdalev, A.M. Gaskov, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 5, pp. 611–616.
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Kazin, A.P., Rumyantseva, M.N., Prusakov, V.E. et al. Cation distribution in nanocrystalline Ni x Zn1 − x Fe2O4 spinel ferrites. Inorg Mater 48, 525–530 (2012). https://doi.org/10.1134/S002016851205007X
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DOI: https://doi.org/10.1134/S002016851205007X