Sodium trivanadium(III) bis(sulfate) hexahydroxide.

The title compound, NaV(3)(SO(4))(2)(OH)(6), was synthesized and found to crystallize in the trigonal space group R-3m with the Na atom at a site with 3;m symmetry, the V atom at a site with 2/m symmetry, and the S and a terminal O atom at sites with 3m symmetry; the remaining two O atoms and the H atom are at sites with m symmetry. Octahedrally coordinated vanadium and tetrahedral sulfate ions share corners to form layers that are held together by hydrogen bonds and by sodium ions, which are located between the layers.