Abstract
Room-temperature crystal structure of a new spinel (formula: Li 0.75 Fe 4.75 Zn 0.5 O 8 ) obtained by ionic exchange from s″ ferrite compound (formula: Na 1.3 K 0.6 Fe 10.1 Zn 0.9 O 17 ) is refined from X-ray single crystal data. The compound is cubic (space group P 4 3 32) with cell parameter a =8.239(1) A. Crystal structure and distribution of Li, Zn, and Fe cations among the different crystallographic sites have been determined. Magnetic properties and influence of annealing have been studied. Coercive field reaches a value up to 134 Oe for a crystallite size lower than 0.2 μ, as a consequence of a strong shape anisotropy.
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