title: Poly[diaqua-(μ-oxalato)(μ-2-oxidopyridinium-3-carboxyl-ato)lanthanum(III)].
abstract: In the title complex, [La(C(6)H(4)NO(3))(C(2)O(4))(H(2)O)(2)](n), the La(III) ion is coordinated by eight O atoms from two 2-oxido-pyridinium-3-carboxyl-ate ligands, two oxalate ligands and two water mol-ecules in a distorted bicapped square-anti-prismatic geometry. The carboxyl-ate groups link adjacent La(III) ions, forming two-dimensional layers that are further linked by N-H⋯O and O-H⋯O hydrogen bonds.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Hu
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Zhu