X-ray diffraction and optical spectroscopic analysis on the crystallographic phase stability of shock wave loaded L-Valine.

Most of the materials undergo phase transitions under shock-loaded conditions while a few of the materials experience lattice deformations. Such phase transitions and lattice deformations significantly affect the efficiency of the second harmonic generation of nonlinear optical materials. In the present context, we have undertaken the investigation of the powder samples of L-Valine (C₅H₁₁NO₂) which is one of the efficient nonlinear optical materials. In order to assess the crystallographic phase stability under shock-loaded conditions, shock-exposed samples and the virgin sample were directed to undergo the process of characterizations by employing X-ray diffraction, optical spectroscopy and microscopic studies. Based on the above-mentioned analytical results, it is established that the title sample exhibits the behavior of high shock resistance and the observed diffraction results have been compared with the diffraction results of potassium dihydrogen phosphate (KDP) such that the outcomes could be substantiated. [ABSTRACT FROM AUTHOR]