A new triheteropoly complex was synthesized containing two hetero cations Ni+2 and Co+2. The polyvanadate anion has composition [V6O19] maintaining pH at 4.5. Product obtained was brown in appearance. The IR spectral analysis of the product suggests the presence of Ni-O, Co-O, V-O V=O and V-O-V along with hydrogen bonded H20 group in the complex. The molecular weight of the triheteropoly complex is determined by cryscopic method in accordance with the calculated value. After the study of the thermal stability of the product. It was observed that the product had multistep decomposition as per TGA graph producing about 43.269% weight loss which was also duly supported by DTA graph indicating large exothermic peak maxima at 95.59 oC. On the basis of analytical, IR spectral and thermal stability data the composition of the product is assigned as Na4 [Ni CoV6 O19] 22.5H2O.
Triheteropolyvanadate Preparation, Cryoscopy, IR Spectral Analysis, Thermal Analysis, DTA and TGA`