Abstract: Ternary heteropoly compound was prepared by introducing cupric ion into the framework of PW₁₂ heteropolyanion with Keggin structure. The characterization of XRD showed that the value of d₀₀₁ was 1. 46 nm. The IRband of heteropolyanion was similar to that of the precausor heteropoly salt. The cupric ion in the heteropolyanion was situated in a cubic cone field with pentadentate. Its symmetry was reproduced by introducing the heteropolyanion into the hydrotalc layered region. The stability of pillared hydrotalc is higher than that of pure heteropolyanion.

Key words: Ternary heteropoly compound, Hydrotalc pillared with heteropolyanion, Microwave cross-linking