electronic reprint Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368 Editors: W. Clegg and D. G. Watson Redetermination of the Tutton’s salt Cs 2 [Cu(H 2 O) 6 ](SO 4 ) 2 Paolo Ballirano, Girolamo Belardi and Ferdinando Bosi Copyright © International Union of Crystallography Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained. Republication of this article or its storage in electronic databases other than as specified above is not permitted without prior permission in writing from the IUCr. For further information see http://journals.iucr.org/services/authorrights.html Acta Cryst. (2007). E63, i164–i165 Ballirano et al. Cs 2 [Cu(H 2 O) 6 ](SO 4 ) 2