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Thermal analysis of some double decavanadates

Ľ. Ulická and Č. Vargová

Department of Inorganic Cliemistry, Faculty of Natural Sciences, Komenský University, 801 00 Bratislava


Abstract: The dehydration of K2Zn2V10O28.16H2O, K2Cd2V10O28.14H2O, K4CdV10O28.10H2O and CsCdV10O28.11H2O was studied by thermogravimetry and DTA and the ir spectra and x-ray diffraction patterns of the products were compared with those of the starting materials. The release of the structural H2O in dehydration produces a labile crystal structure formed by a voluminous anion and relatively small cations. Further heating of the anhyd. decavanadates produces a more stable lattice with a less compact comfiguration of the decavanadate anion. The structure of this newly produced anion is dependent upon the size and polarization properties of the cations.

Full paper in Portable Document Format: 272a152.pdf


Chemical Papers 27 (2) 152–158 (1973)

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