The title complex, {[Cd(C2O4)(C2H3N3S)(H2O)]·H2O}n, has a two-dimensional metal-organic framework, with the Cd(II) cation coordinated by three oxalate ligands, a 1H-1,2,4-triazole-5(4H)-thione (H2trzS) ligand and a water molecule. The CdO6S and oxalate units form an extended two-dimensional layered structure, with the terminal H2trzS ligands bonded to the Cd(II) sites through the thione S atoms. Hydrogen-bond interactions exist between adjacent layers.
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