Figure 6
Crystal structure of the β phase of P.O.13 (in space group Pbca). (a) Mutual arrangement of two neighbouring molecules. The arrows denote the interplanar angles. View direction ≈ [801]. The two molecules are related through a c glide plane. (b) Packing diagram, with symmetry elements. View direction [010]. (c) First molecular layer, containing the molecules in the range 0 < y < 0.5, with layer symmetry elements. All symmetry elements are crystallographic ones. View direction [010]. (d) Second layer, containing molecules in the range 0.5 < y < 1. View direction [010]. |