Abstract
The results of optical, scanning electron microscope and qualitative analysis studies conducted on surface structures displayed by flux-grown DyFeO3 crystals are reported. The crystals were grown from PbO-PbF2 B2O3 flux under various conditions. Magnetoplumbite (PbO · 6Fe2O3) is the most favoured secondary phase. Crystallization of DyOF and DyBO3 on the DyFeO3 crystal surfaces also takes place, almost at the end of DyFeO3 crystal growth. Macro- and micro-disc patterns on DyFeO3 and a rare observation of an elliptical disc of material containing lead are illustrated. Metallic platinum deposited on flux-grown DyFeO3 is reported when the crystals were finally cooled in contact with the flux. Additional secondary phases (material containing lead, platinum, PbO · 6Fe2O3, DyBO3) and other imperfections (inclusions, cavities, microcrystals) also occur. The addition of V2O5 to the flux leads to incorporation of traces of vanadium in the DyFeO3 crystals and DYVO4 as a secondary phase.
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