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What are the inverse spinel structures?

  INVERSE SPINEL STRUCTURE (Fe3O4-Magnetite):

In Fe3O4, Fe+2 and Fe+3 ions are present in the ratio 2:1. it may be considered as having composition FeO.Fe2O3. In Fe3O4 Oxide arranged in ccp. Fe+2 ions occupy octahedral voids while Fe+3 ions are equally distributed between octahedral and tetrahedral voids
MgFe2O4 also has structure similar to magnetite. In this Mg+2 ions are present in place of Fe+2 ion in Fe3O4. Magnetite has inverse spinet structure.


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