Determination of optical constants and mechanical properties of thiourea based metal complex crystal
- Solution growth method, XRD, Fluorescence spectral study, SHG, Hardness
Bis-thiourea stannous chloride dihydrate (BTSCD) crystal were grown by solution growth method in the molar ratio 2:1 at room temperature. Transparent and defect free crystal of BTSCD were harvested in the period of 35-45 days with dimension 5mm × 4mm × 2mm. Single crystal XRD analysis revealed that the BTSCD crystal belongs to Orthorhombic crystal system. The sharp and well defined Bragg peaks observed in the powder XRD pattern confirm the crystalline nature of BTSCD crystal. The presences of functional groups in the grown BTSCD crystal were identified by FT-IR analysis. UV-visible analysis was carried out to determine the lower cut off wavelength. Also optical constants like Band gap (Eg), Refractive index (n), Reflectance (R), Extinction coefficient (K) and Electric susceptibility were determined from UV-VISNIR spectrum Second harmonic generation (SHG) of powdered BTSCD sample was tested using Nd: YAG laser and is found to be 0.55 times that of potassium dihydrogen orthophosphate. The mechanical strength of the BTSCD crystal was evaluated and it describes that the Vickers hardness number of BTSCD is found to be increase with the applied load. The work hardening co-efficient (n) has been calculated from the slope of straight line between log P and log d.