Di-methyl-ammonium tetra-aqua-(hydrogen-sulfato)-sulfato-cuprate(II)

In the title salt, [(CH3)2NH2][Cu(HSO4)(SO4)(H2O)4], one type of cation and anion is present in the asymmetric unit. The Cu(II) atom in the complex anion, [Cu(HSO4)(SO4)(H2O)4](-), has a tetra-gonal bipyramidal [4 + 2] coordination caused by a Jahn-Teller distortion, with the aqua ligands in equatorial and two O atoms of tetra-hedral HSO4 and SO4 units in apical positions. Both types of ions form sheets parallel to (010). The inter-connection within and between the sheets is reinforced by O-H⋯O and N-H⋯O hydrogen bonds, respectively, involving the water mol-ecules, the two types of sulfate anions and the ammonium groups.