Anisotropy of thermal expansion and compressibility of non-centrosymmetric (H3AmGP)SiF6

Abstract

The crystal structure of the new compound 3-guanidinium-2-aminopropionic acid hexafluorosilicate was studied by single crystal X-ray diffraction at various temperature (100–400 K) and pressure conditions (10–4–0.75 GPa). Anisotropy of both thermal expansion and compressibility was correlated with the hydrogen bonding patterns and especially with the stiffness of small ring patterns. The measured second harmonic generation response for the studied compound is 0.3 that of potassium dihydrogen phosphate and is comparable to L-arginine chloride.