Poly[diethyl­enetriammonium [aquadi-μ(2)-sulfato-sulfatocerium(III)]]

A new organically templated open-framework cerium sulfate, {(C(4)H(16)N(3))[Ce(SO(4))(3)(H(2)O)]}(n), was hydro­thermally synthesized. The Ce(III) cation is nine-coordinated by nine O atoms, including one water mol­ecule. Two of the SO(4) groups afford one monodentate and bidentate linkages as the bridge to connect adjacent Ce(III) cations, while the third SO(4) group attaches the Ce(III) cation in a bidentate mode. The crystal structure consists of layers composed of eight-membered-ring networks formed by four CeO(9) polyhedra and four SO(4) tetra­hedra. The triply protonated diethyl­enetriamine cations are located between adjacent layers and connect the layers via hydrogen bonds.