Poly[[di­aqua­deca-μ₂-cyanido-κ²⁰C:N-hexa­cyanido-κ⁶C-bis­(μ₂-5-methyl­pyrimidine-κ²N:N′)bis­(5-methyl­pyrimidine-κN)tricopper(II)ditungstate(V)] dihydrate]

In the title complex, {[Cu₃[W(CN)₈]₂(C₅H₆N₂)₄(H₂O)₂]·2H₂O}_n, the coordination polyhedron of the eight-coordinated W^V atom is a bicapped trigonal prism, in which five CN groups are bridged to Cu^II ions, and the other three CN groups are terminally bound. Two of the Cu^II ions lie on a centre of inversion and each of the three independent Cu^II cations is pseudo-octahedrally coordinated. In the crystal structure, cyanido-bridged-Cu—W—Cu layers are linked by pillars involving the third independent Cu^II ion, generating a three-dimensional network with non-coordinating water mol­ecules and 5-methyl­pyrimidine mol­ecules. O—H...O and O—H...N hydrogen bonds involve the coordinating and non-coordin­ating water mol­ecules, the CN groups and the 5-methyl­pyrimidine mol­ecules.