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In the title coordination polymer, [CdZn(CN)4(C5H5N)2]n, the ZnII atom (site symmetry 222) adopts a distorted ZnC4 tetrahedral geometry, being coordinated by four crystallographically equivalent cyanide ions. The cyanide ion bridges to a CdII centre via its N atom. The Cd atom (site symmetry 2/m) coordination is a distorted CdN6 octahedron, arising from four cyanide N atoms and two pyridine N atoms. The complete pyridine molecule is generated by m symmetry, with the N atom and one C atom lying on the reflecting plane. In the crystal, the bridging cyanide ions result in a three-dimensional network.