Figure 2
[001] projection of the unit cell of HTGS at 20 K with hydrogen bonds shown as dashed lines. The O15—H15⋯O3 hydrogen bonds are shown as pink dashed lines. Glycine molecules are represented as glycine I (GI), glycine II (GII), and glycine III (GIII), according to Hoshino et al. (1959). Symmetry codes: (i) −1 + x, y, 1 + z; (ii) −1 + x, y, z; (iii) 1 − x, + y, 1 − z, (iv) 2 − x, − + y, 2 − z. |