Crystal structure of dimanganese(II) zinc bis­[ortho­phosphate(V)] monohydrate

The title compound, Mn(2)Zn(PO(4))(2)·H(2)O, was obtained under hydro­thermal conditions. The structure is isotypic with other transition metal phosphates of the type M (3−) (x)M′(x)(PO(4))(2)·H(2)O, but shows no statistical disorder of the three metallic sites. The principal building units are distorted [MnO(6)] and [MnO(5)(H(2)O)] octa­hedra, a distorted [ZnO(5)] square pyramid and two regular PO(4) tetra­hedra. The connection of the polyhedra leads to a framework structure. Two types of layers parallel to (-101) can be distinguished in this framework. One layer contains [Zn(2)O(8)] dimers linked to PO(4) tetra­hedra via common edges. The other layer is more corrugated and contains [Mn(2)O(8)(H(2)O)(2)] dimers and [MnO(6)] octa­hedra linked together by common edges. The PO(4) tetra­hedra link the two types of layers into a framework structure with channels parallel to [101]. The H atoms of the water mol­ecules point into the channels and form O—H⋯O hydrogen bonds (one of which is bifurcated) with framework O atoms across the channels.