Poly[[diaquatris[μ4-(p-phenylenedioxy)diacetato]didysprosium(III)] dihydrate]

The title dysprosium coordination polymer, {[Dy2(C10H8O6)3(H2O)2]·2H2O}n, was synthesized by reacting dysprosium(III) nitrate and the flexible ligand (p-phenyl­enedi­oxy)diacetic acid under hydro­thermal conditions. Each DyIII ion is coordinated by nine O atoms in a tricapped trigonal prismatic geometry. The DyO9 polyhedra form layers parallel to the bc plane. The rigid benzene rings of the anions link the layers along the a axis, forming a three-dimensional framework.