Abstract
Zinc tris Thiourea Sulphate (ZTS) is a semi organic non-linear optical crystal. The ZTS and phosphate mixed (in different mol %) ZTS crystals have been grown from aqueous solution using the slow evaporation method. Single crystal XRD were carried out for ZTS and phosphate mixed ZTS crystals to determine cell parameters. FTIR analysis identified modes of vibrations of different molecular groups and confirms the presence of phosphate ion. The UV-Vis-NIR spectrum shows that the material has wide optical transparency in the entire visible region. The second harmonic generation (SHG) was confirmed by Kurtz powder method. It is found that 10 mol % of phosphate mixed ZTS crystal has better SHG efficiency than pure ZTS crystal. The Vicker microhardness test was carried out on the grown crystals and Vicker’s Hardness Number was found increase with increase in phosphate mixing.
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