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metal-organic compounds
Each La3+ ion in catena-poly[[diaqua(2-furancarboxylato-O,O')lanthanum(III)]--(2-furancarboxylato-O,O':O')], [La(C5H3O3)3(H2O)2]n, is coordinated to seven O atoms from furancarboxylato groups and to two O atoms of water molecules in a distorted monocapped square-antiprism configuration. The rare earth metal ions are bridged by the carboxylate groups to form an infinite two-dimensional polymeric network.