Redetermination of K(4)[Bi(2)Cl(10)]·4H(2)O

In comparison with the previous refinement of tetra­potassium di-μ-chlorido-bis­[tetra­chloridobismuthate(III)] tetra­hydrate [Volkova, Udovenko, Levin & Shevchenko (1983). Koord. Khim. 9, 356–360], the current redetermination reveals anisotropic displacement parameters for all non-H atoms, localization of the H atoms, and higher precision of lattice parameters and inter­atomic distances. The crystal structure is built up of edge-sharing [Bi(2)Cl(10)](4−) double octa­hedra with the bridging Cl atoms situated on a mirror plane, three K(+) counter-cations (two of which are on mirror planes), and two water mol­ecules that are solely coordinated to the K(+) cations. These building units are linked into a three-dimensional network structure. Additional O—H⋯Cl hydrogen bonds between the water mol­ecules and the complex anions stabilize this arrangement.