Growth, characterization, non-linear optical properties and dislocation studies in new GCF crystals

Comments on the papers recently published by M.M. Khandpekar and S.P. Pati

“…Table 1 of Ref. [5] coincides with the Raman spectrum of 3Gly Á KIO 3 shown in [4], while orthorhombic cell parameters (a ¼20.039Å, b ¼12.600Å, and c ¼7.641Å) coincide with that of 2Gly Á HF Á HCl [2]. As above, the calculated data for the composition 3Gly Á KNO 3 (N (17.17), C (22.09), H (4.63), O (44.13), and K (11.98)) do not correspond to the experimental values.…”

“…[2] the authors report obtaining a ''mixed transparent crystals of a-glycine, HCl and HF'' from a saturated solution containing Gly, HCl, and HF in 2:1:1 molar proportion by slow evaporation. [2] the authors report obtaining a ''mixed transparent crystals of a-glycine, HCl and HF'' from a saturated solution containing Gly, HCl, and HF in 2:1:1 molar proportion by slow evaporation.…”

“…Nevertheless, some papers by Khandpekar and Pati [2][3][4][5] have been published, reporting new compounds without presenting crystal structures. In our opinion, these papers are questionable in some aspects.…”