Poly[bis[aquaneodymium(III)]-mu2-oxalato-di-mu4-succinato].

In the title compound, [Nd(2)(C(4)H(4)O(4))(2)(C(2)O(4))(H(2)O)(2)](n), the flexible succinate anion assumes the gauche conformation and bridges the nine-coordinate Nd atoms to generate two-dimensional layers parallel to (010). The coordination polymer layers are linked into a three-dimensional framework by the rigid oxalate ligands. The oxalate ions are located on a center of inversion.