Triglycine sulfate (TGS) arid ifs analogs can be presented by the molecular structure AH(A AH)Y, where A is an amino acid (glycine in TGS) in zvviller-ionic form, AR is a prolonalecl cationic amino acid, (A AR) is a dimeric cation, vvhere A and AR are connected by a short hydrogen bond, and Y is a divalent anion. Doing research On amino acid hexafluorosilicates we obtained a series of salts with different compositions, including four hexafluorosilicate salts which chemically are analogs of ti iglycine sulfate. Those are GlyH(Gly GlyH)SiF6 (l), SarH(Sar SarH)SiF6 2E(2)O (II), r-AlaH(r-Ala r-AlaH)SiF6 H20 (Ill) and r-ProH(rPro r-ProH)SiF6 H2O (IV). We have already published our results On crystals (II) and (Ill). In this work we report our results on the crystals (I) and (IV). (C) 2013 Elsevier B.V. All rights reserved