Abstract
Interatomic distance considerations and site occupancy refinements indicate that Zn2+ is exclusively located on tetrahedral sites in both Z and X-type hexagonal ferrites. Zinc is more strongly enriched in four layer thick spinel blocks of X-type hexaferrite than in the two layer thick spinel blocks of both magnetic oxides. No zinc was incorporated in the tetrahedra of the T blocks of Z-type hexaferrite. Bond valence analyses reveal different local charge compensation requirements as origin of the unequal distribution of diamagnetic Zn2+ over the tetrahedral sites, which strongly modify the magnetic properties. Diamagnetic zinc is more strongly enriched on the tetrahedral sites in the four layer thick spinel blocks of X-type hexaferrite than in the two layer thick spinel blocks of both compounds which strongly modifies their magnetic properties.
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