Growth of ZnWO4 Crystals from Na20-W03 Flux

Abstract

Well-formed crystals of ZnWO4 were grown in Na20-W03 (Na20WO3 or Na202 W03) flux. Crystal growth was conducted by heating mixtures at 1100 °C for 5 h, followed by cooling to 500 °C at a rate of 5 °C/h. Grown crystals were colorless and transparent. The crystals had the forms of rod, thin plate, and thick plate. The rod crystals grown in Na20WO3 solution containing 50 mol% solute were up to 12 mm in length. Regardless of crystal form, the grown crystals were bounded by {100}, {010}, {110}, {102}, and {111} faces. In certain instances, the {111} faces did not appear.