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- Author or Editor: D. Joniaková x
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The thermal decomposition of K3[OH{VO(O2)2}2]·H2O was studied under dynamic conditions up to 350°C and also isothermally at 150°±3°C in self-generated atmosphere. K4[V2O6(O2)] is formed as the reaction intermediate. The final products of thermal decomposition of K3[OH{VO(O2)2}2]·H2O are KVO3 and K4V2O7.
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.
