Abstract: A new sort of heteropoly blue compound,ZrW_1.7^ⅥW_0.3^ⅤO₇H_0.3(OH)₂·2H₂O,was synthesized by the acidic-steam hydrothermal process and the microemulsion hydrothermal process. XRD pattern proves that the heteropoly blue compound has the same type of crystal structure as that of ZrMo₂O₇（OH）₂· 2H₂O. The rietveld refinement method was used to refine the crystal structure of the heteropoly blue compound. The bond parameters were calculated and the bond valences of atoms were obtained. The EPR result affirmed the subsistence of W Ⅴ ion in the new compound,and the molar ratio of W Ⅴ/W Ⅵ was determined by XPS. Combining with bond valences of atoms and IR spectra analysis,random hydroxylation of W—O3—H_0.15 exits in the molecule and the FTIR absorption spectra were assigned.

Key words: Heteropoly blue, ZrW_1.7^ⅥW_0.3^ⅤO₇H_0.3(OH)₂·2H₂O, EPR