Acta Cryst. (2009). E65, m682 [ doi:10.1107/S1600536809018194 ]
Abstract: In the title complex, [La(C6H4NO3)(C2O4)(H2O)2]n, the LaIII ion is coordinated by eight O atoms from two 2-oxidopyridinium-3-carboxylate ligands, two oxalate ligands and two water molecules in a distorted bicapped square-antiprismatic geometry. The carboxylate groups link adjacent LaIII ions, forming two-dimensional layers that are further linked by N-HO and O-HO hydrogen bonds.
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