Poly[[diaqua­(1,10-phenanthroline-κ(2) N,N′)(μ(3)-4-sulfonato­benzene-1,2-dicarboxyl­ato-κ(4) O (1):O (2) ,O (2′):O (4))dysprosium(III)] dihydrate]

The 4-sulfophthalate trianion in the polymeric title complex, {[Dy(C(8)H(3)O(7)S)(C(12)H(8)N(2))(H(2)O)(2)]·2H(2)O}(n), bridges three water/phenanthroline-coordinated Dy(III) atoms to form a three-dimensional network architecture. The metal atom is further chelated by a carboxyl­ate group and is covalently bonded to a monodentate carboxyl­ate group and to a monodentate sulfonate group in a distorted square-anti­prismatic geometry. The coordinating and the solvent water mol­ecules are hydrogen bonded to the network. In the crystal, one solvent water mol­ecule is disordered over two positions [major component = 59 (3)%].