Comment on the paper by R. Sankar, C.M. Ragahvan, R. Mohan Kumar, R. Jayavel, “Growth and characterization of bis-glycine sodium nitrate (BGSN), a novel semiorganic nonlinear optical crystal”, J. Crystal Growth 309 (2007) 30–36

Abstract

It is argued that the conclusion of the authors of the title paper on obtaining of a new crystal bis-glycine sodium nitrate is erroneous. From an aqueous solution containing 2 glycine+NaNO 3 the authors actually have obtained earlier known crystals: glycine (alpha form) and glycine sodium nitrate.