Sodium thiourea bromide (STB), a new semiorganic nonlinear optical material, has been synthesized and single crystals were grown from aqueous solution. The FT-IR spectrum confirms the compound formation. Single crystals of STB have been grown by slow evaporation of solvent at room temperature. The grown crystal was subjected to single crystal X-ray diffraction, UV-Vis-NIR, TG/DTA and DSC analyses. The second harmonic generation of STB was measured by Kurtz and Perry powder technique. The laser damage threshold value was determined using a Qswitched Nd:YAG laser operating at 1064 nm with 65 ns pulses in single shot mode. The mechanical property of the grown was determined by Vicker’s hardness test.
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