Figure 3
Packing diagrams: (a) for (II) showing layers parallel to the (010) plane; (b) for (III) showing ribbons built up from the anions, water molecules and K+ cations extending along the [001] direction. Water molecules in cavities (O9W and O91W) and disordered atoms (O31C, O32C, O7W and K71) in (III) have been omitted for clarity. |