Figure 3
Cronstedtite-1M, refined crystal structure, side view close to b (monoclinic indexing). Three consecutive 1:1 layers (in different colours) are displayed in order to demonstrate the stacking rule and sequence. Note the geometry of hydrogen bonds. D—H and H—A bonds are represented by full and dashed lines, respectively. The delimitations of OD layers and packets are indicated in the lower-right corner together with respective symbols of layer groups (valid for the idealized structure model). The delimitations of Tet and Oc sheets, and of the 1:1 (structure building) layer are indicated in the lower left corner. |