The Effect of L-Valine on the Growth and Characterization of Lithium Sulphate Monohydrate Single Crystals

Abstract

Pure and amino acid doped good quality single crystals of Lithium Sulphate Monohydrate (LSM) were grown by slow evaporation solution growth technique at room temperature using water as solvent. The effect of amino acid (L-valine) dopant on the growth and characterization of LSM single crystal was investigated. Single-crystal X-ray diffractometer was utilized to find the unit cell parameters for pure and L-valine doped LSM crystals. The powder X-ray diffraction pattern of the grown crystals has been indexed. The modes of vibration of different molecular groups present in the samples were identified by the FTIR spectral analysis. The UV-vis-NIR studies were used to find the optical transmittance and the lower cut off wavelength. The mechanical properties of the grown crystals have been analyzed by Vickers micro hardness method. The thermal properties of both pure and L-valine doped LSM single crystals were studied by TGA/DTA measurements. The NLO property of L-valine doped and pure LSM crystals using KDP crystal as a reference were studied by SHG measurements.

Keywords: Crystal growth, XRD, FT-IR, TGA/DTA, micro-hardness, NLO

Cite this Article

S. Bagavathi, C. Krishnan, P. Selvarajan. The Effect of L-Valine on the Growth and Characterization of Lithium Sulphate Monohydrate Single Crystals. Research & Reviews: Journal of Physics. 2019; 8(1): 92–103p.