GROWTH AND SPECTROSCOPIC CHARACTERIZATION OF UREA SULPHAMIC ACID CRYSTAL: A SECOND-ORDERNONLINEAR MATERIAL

An organic single crystal of Urea Sulphamic Acid crystals (US) was grown by slow evaporation technique at room temperature (30°C).The structure of grown crystal was discovered from the X-ray diffraction study and it belongs to the triclinic system.Vibrational modes of Urea Sulphamic crystal was identified by the employing FTIR spectral analysis.UV-Visible spectral studies showed that the lower cut-off wavelength was found to be 236 nm.The impedance study has been carried out and it was showing a maximum at low frequency and decreases with increasing frequency.The thermal stability of the crystal was determined by employing thermo-gravimetric analysis (TGA) and differential scanning calorimetry (DSC) methods for the grown crystal.Second harmonic generation measurement indicate that the efficiency of urea sulphamic acid nonlinear crystal was 1.1 times greater than that of KDP crystal.The analysis results confirmed that these crystals have better nonlinearity and good mechanical strength.