Figure 2 Coordination sphere of the Na+ cation in (I). Displacement ellipsoids are shown at the 50% probability level. [Symmetry codes: (iii) x + 1, y + 2, z; (iv) x, y + 1, z; (v) x + 1, y + 1, z; (vi) -x + 1, -y + 2, -z + 1; (viii) -x + 2, -y + 3, -z + 1; (xi) -x + 1, -y + 1, -z + 1; (xii) -x + 2, -y + 2, -z + 1].  [article HTML]