Acta Cryst. (2007). E63, m2339-m2340 [ doi:10.1107/S1600536807039086 ]
Abstract: The crystal structure of the title compound, [Cu4(C6H4O7)2(H2O)4]n, has been reported twice previously, by Mastropaolo, Powers, Potenza & Schugar [(1976). Inorg. Chem. 15, 1444-1449] and Zhang, Yang & Ma [(2006). Cryst. Growth Des. 6, 375-381]. These authors used strong reflections only for the unit-cell determination. The present structure redetermination is based on intensities measured at low temperature (120 K). The new data set (including the intensities of hkl with h = 2n + 1, omitted in earlier papers) indicates a doubled cell volume and the presence of four pentacoordinated copper cations, two tetra-ionized citrate anions and four water molecules in the asymmetric unit.
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