Growth, Spectral, Optical and Thermal Characterisation of Semiorganic NLO Material:L-histidinium hexaflurosilicate single crystal

Semiorganic L-histidinium hexaflurosilicate single crystal was grown by solvent evaporation solution growth technique. From PXRD, the crystallographic data were found as a= 8.3496 angstrom, b= 8.3376 angstrom, c= 29.2973 angstrom and alpha=beta=gamma= 90 degrees with tetragonal crystal system (S. G. P41212). The crystalline perfection was studied by HRXRD. The molecular structure was identified using FT-IR and FTRaman spectral analysis. The crystal has 60% transparent in the visible region with a lower cutoff wavelength of 224 nm and optical band gap 4.15 eV. Laser damage threshold and frequency conversion efficiency were calculated as 3.89 GW/cm(2) and 52 mV, respectively. Thermal studies indicate that the crystal was stable up to 260 degrees C.