Redetermination of [EuCl(2)(H(2)O)(6)]Cl

The crystal structure of the title compound, hexa­aqua­dichlorido­europium(III) chloride, was redetermined with modern crystallographic methods. In comparison with the previous study [Lepert et al. (1983 ▶). Aust. J. Chem. 36, 477–482], it could be shown that the atomic coordinates of some O atoms had been confused and now were corrected. Moreover, it was possible to freely refine the positions of the H atoms and thus to improve the accurracy of the crystal structure. [EuCl(2)(H(2)O)(6)]Cl crystallizes with the GdCl(3)·6H(2)O structure-type, exhibiting discrete [EuCl(2)(H(2)O)(6)](+) cations as the main building blocks. The main blocks are linked with isolated chloride anions via O—H⋯Cl hydrogen bonds into a three-dimensional framework. The Eu(3+) cation is located on a twofold rotation axis and is coordinated in the form of a Cl(2)O(6) square anti­prism. One chloride anion coordinates directly to Eu(3+), whereas the other chloride anion, situated on a twofold rotation axis, is hydrogen bonded to six octa­hedrally arranged water mol­ecules.