Comments on the paper: Comparative study of mechanical, dielectric and electrical properties of solution grown semi-organic NLO crystal glycine with additives-ammonium oxalate, potassium and barium nitrate

摘要

A reinvestigation of the growth of the nonlinear optical (NLO) crystal glycine ammonium oxalate is reported. The slow evaporation of an aqueous solution containing equimolar quantities of glycine and ammonium oxalate monohydrate results in the fractional crystallization of ammonium oxalate monohydrate and not the semi-organic nonlinear optical (NLO) crystal glycine ammonium oxalate as reported by the authors of the title paper in Indian J Pure & Appl Phys, 51 (2013) 55-59.