Abstract: | In the structure of the title compound, Er(C6H6NO6)(H2O)]n, the Er atoms are eight‐coordinated by one N atom and six O atoms from three symmetry‐related nitrilotriacetate (NTA) ligands, and by one O atom of a water molecule, adopting a distorted square‐antiprismatic geometry. The Er atoms are linked by the NTA ligands into layers, which are interconnected via O—H?O hydrogen bonds between the water molecules and the carboxylate O atoms. The asymmetric unit contains one Er atom, one NTA ligand and one water molecule, all of which are located in general positions. |