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Non-stoichiometric ternary chalcogenides, Zn 1−x Fe x S, were prepared by co-precipitation of ZnS and FeS by Na 2 S from aqueous solutions containing FeSO 4 and ZnSO 4 and sintering of pellets of the co-precipitate repeatedly between 800 and 1000°C. The chemical composition of the resulting solids as analyzed by XRF, EDAX, and EPMA, reflected the composition...
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