Abstract

Single crystals of BaSO 4, SrSO 4 and PbSO 4 have been grown by the flux evaporation method by employing NaCl as flux for BaSO 4 and SrSO 4, and Na 2SO 4 for PbSO 4. The crystals grown by this method are identified with the help of X-ray diffraction photographs. The effect of cooling rate on the morphology of the crystals has been studied in the case of SrSO 4 and BaSO 4. By employing etching techniques, the dislocation densities of BaSO 4 and SrSO 4 have been evaluated and found to be very low as compared to that of natural crystals. A plausible mechanism of growth of the crystals grown by the chemically reacted flux method by Patel et al. has been suggested.

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