Dieuropium(III) trisulfate octahydrate: A redetermination at 120 K

Abstract

The title compound, Eu2(SO4)3̇8H 2O, crystallizes in space group C2/c, with one of the anions lying on a twofold rotation axis and the other in a general position, and is best formulated as [Eu(H2O)4/1(SO4) 3/3(SO4)1/2]2, where one of the anions lies across a twofold axis. The coordination environment of Eu 111 consists of four water molecules and four sulfate ions. All the water molecules and sulfate ions are involved in hydrogen-bonding interactions. The structure is similar to that previously determined at 293 K [Wei & Zheng (2003). Z. Kristallogr. New Cryst. Struct. 218, 277-278], but the cell parameters and the interatomic distances are more precise in the present determination. © 2004 International Union of Crystallography Printed in Great Britain - all rights reserved.