A single crystal X-ray diffraction study of Na3[Rh(SO3)3(NH3)3]·6H2O was carried out (X8 APEX BRUKER automated diffractometer, MoKα radiation, graphite monochromator); crystal data are a = 10.1844(1) Å, c = 64.0815(13) Å, V = 5756.17(14) Å3, space group R\documentclass[12pt]{minimal}
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\end{document}c, Z = 12. The general motif of the structure was analyzed in terms of the mutual spatial arrangement of the [(NH3)3Rh(SO3)3-Na-(SO3)3Rh(NH3)3]5− fragments, where the Na+ cation is surrounded by six oxygen atoms belonging to six SO3 groups. This cation resides on the inversion center, all Na-O distances are identical, 2.347 Å. The selected fragments follow the nodes of a rhombohedral sublattice (ac = 12.19 Å, αc = 49.38°) formed by the intersection of three symmetry-related families of planes (1 0 2).
