Influence of Zinc and Ammonium Compounds on the Growth and Characterisation of L Alanine NLO Crystals

Abstract

Single crystals of zinc sulphate monohydrate L alanine and ammonium sulphate L alanine had been grown by slow evaporation technique. The crystalline nature and unit cell parameters of the grown crystals were determined using powder and single crystal X-ray diffraction. The grown crystals retained the orthorhombic crystal system. UV-vis transmittance and second harmonic generation studies were performed to analyze the optical behaviour of the crystals. The Fourier transform infrared spectra were recorded in the region 4000-400 cm −1 to identify the presence of functional groups. Thermogravimetric analysis helped to determine the percentage of decomposition of the sample at different temperatures as well as the thermal stability of the compound. Mechanical and electrical properties of grown crystals were ascertained through the Vickers micro hardness and dielectric studies.