CRYSTAL NUCLEATION, CRYSTAL GROWTH, SPECTRAL AND SHG STUDIES OF POTASSIUM IODATE CRYSTAL

Solution growth was adopted to grow crystals of potassium iodate and here AR grade chemicals of potassium chloride and iodic acid were used in the crystal growth experiment. The grown crystals were observed to be transparent and slightly hygroscopic. The solubility study has been carried out in the temperature range 30o C-60o C in water and it is found that the sample has positive temperature coefficient of solubility. The critical nucleation parameters were evaluated by nucleation kinetic studies. The lattice constants of the grown crystal of potassium iodate were found by XRD method and the crystallizes in triclinic system. The presence of the functional groups in the sample was confirmed by FTIR and FT-Raman methods. The nonlinear optical property of the grown crystal was confirmed by Kurtz-Perry powder technique and a study of its Second Harmonic Generation (SHG) efficiency in comparison with potassium dihydrogen phosphate (KDP) has been made