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- Author or Editor: Ľ. ŽÚrková x
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A DTA study of the thermal properties of Tl2V6O16, showed that its structure is not decomposed up to 475 °C. It melts at 505 °C. Tl2V8O21 and Tl3V5O14 crystallize successively from the melt.
Abstract
Thermal decomposition of three tetravanadates, [MII(phen)3]2V4O12·phen·22H2O, where M II is Co (1), Ni (2), Cu (3) and phen is 1,10-phenanthroline, was studied by dynamic method (for 1 and 2) or isothermally (for 3). The thermal decomposition of the studied compounds is a multi-step process which involve: discontinuous dehydration, release of uncoordinated, and of coordinated phenanthroline molecules. In course of the latter process, a phase transition of the cyclo-tetravanadates to polymeric metavanadates occurred. Metavanadates with chain structure of the anion were the final decomposition products of all tetravanadates studied.
