ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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)