Figure 9
Glycine polymorphs found by USPEX. (a) Representation of glycine zwitterion; (b) α-glycine at 2 GPa (Z = 4, a = 5.390, b = 5.911, c = 10.189 Å, β = 113.2°); (c) β-glycine at 0.4 GPa (Z = 2, a = 5.372, b = 6.180, c = 5.143 Å, β = 111.9°); (d) γ-glycine at 1 GPa (Z = 3, a = b = 7.070, c = 5.490 Å). |