Redetermination of [Gd(NO(3))(3)(H(2)O)(4)]·2H(2)O

The crystal structure of the title compound, tetra­aqua­tris­(nitrato-κ(2) O,O′)gadolinium(III) dihydrate, was redetermined from single-crystal X-ray data. In comparison with the first determination [Ma et al. (1991 ▶). Wuji Huaxue Xuebao, 7, 351–353], all H atoms could be located, accompanied with higher accuracy and precision. The Gd(III) atom shows a ten-coordination with three nitrate ligands behaving in a bidentate manner and the other positions being occupied by four water mol­ecules, forming a distorted bicapped square anti­prism. Two nitrate ions coordinate to the metal atom with similar bond lengths while the third shows a more asymmetric bonding behaviour. An intricate network of O—H⋯O hydrogen bonds, including the lattice water mol­ecules, stabilizes the crystal packing.