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

The crystal structure of the title compound, poly[tetraaquatri-μ-sulfato-dineodymium], [Nd 2 (SO 4 ) 3 (H 2 O) 4 ] n , was re-refined from modern CCD-based single-crystal X-ray diffraction data. In comparison with the original report [Bede (1987). Jiegou Huaxue , 6 , 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-antiprismatic and the other a square-antiprismatic coordination environment. The cations are interconnected by bridging sulfato ligands into a framework structure that is reinforced by classical O—H...O hydrogen-bonding interactions of medium to weak strengths.