| Abstract: | Decasodium uranyl hexasulfate trihydrate, Na10[(UO2)(SO4)4](SO4)2·3H2O, contains an unusual uranyl sulfate cluster with the composition [(UO2)(SO4)4]6?. The cluster is composed of a uranyl pentagonal bipyramid and four sulfate tetrahedra. Three sulfate tetrahedra are linked to the uranyl pentagonal bipyramid by the sharing of vertices, and the other shares an equatorial edge of the uranyl pentagonal bipyramid. The uranyl sulfate clusters occur in layers parallel to (010). The structure also contains two isolated symmetrically distinct sulfate tetrahedra, which also occur in layers parallel to (010). The uranyl sulfate clusters and isolated sulfate tetrahedra are linked through bonds to Na+ cations, and by hydrogen bonding involving the water molecules. |
