Comments on the paper: Growth structural, spectral, optical and mechanical studies of gamma bis glycinium oxalate (GBGOx) new NLO single crystal by SEST method

TL;DR

This paper critically examines the characterization of a purported new NLO crystal, gamma bis glycinium oxalate, revealing significant errors and questioning the validity of the original synthesis and analysis claims.

Contribution

It provides a detailed critique of the previous study, highlighting inaccuracies and emphasizing the need for proper characterization of NLO crystals.

Findings

The original synthesis claims are flawed.

The characterization data are inconsistent and erroneous.

The paper questions the existence of the claimed NLO crystal.

Abstract

The authors of the title paper (Optik, 125 (2014) 1825-1828) claim to have synthesized a new nonlinear optical (NLO) gamma bis glycinium oxalate (GBGOx) crystal by slow evaporation solution technique. In this communication, many points of criticism, concerning the characterization of this so called GBGOx NLO crystal are highlighted to prove that the title paper is completely erroneous.