Re-refinement of dineodymium tris[sulfate(VI)] tetrahydrate

The crystal structure of the title compound, poly[tetraaquatri-μ-sulfato-dineodymium], [Nd₂(SO₄)₃(H₂O)₄] _<i>n</i> , was re-refined from modern CCD-based single-crystal X-ray diffraction data. In comparison with the original report [Bede (1987 ▸). <i>Jiegou Huaxue</i>, <b>6</b>, 70-74], the re-refinement shows improved precision and accuracy, with all hydrogen atoms being located. The crystal structure comprises two crystallographically independent Nd^III sites. One adopts a capped square-anti-prismatic and the other a square-anti-prismatic coordination environment. The cations are inter-connected by bridging sulfato ligands into a framework structure that is reinforced by classical O-H⋯O hydrogen-bonding inter-actions of medium to weak strengths.