Figure 2
A layer of ions at z = . Displacement ellipsoids are drawn at the 50% probability level and H atoms involved in hydrogen-bond formation (dashed lines) are shown as small spheres of arbitrary radii. Selected atoms are labelled. [Symmetry codes: (iii) 1 − y, x − y, z; (iv) y − x, 1 − x, z; (v) 1 + y − x, 1 − x, z; (vi) 1 − y, 1 + x − y, z.] |