Comments on "A comprehensive experimental and computational study of highly efficient organic NLO crystal: Anilinium - L-Tartrate"

Abstract

The authors of the title paper (Opt. Laser Technol. 137 (2021) 106800) claim to have performed an experimental and computational study of anilinium L-tartrate (ALT) crystal. In this letter to Editor, it is shown that the ALT crystal is a surface degraded material. A critical analysis of the title paper is presented to show that the reported experimental data contradict earlier reports on the 1:1 salts of aniline and L-tartaric acid.