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

Study of the effect of temperature, vanadium concentration and degree of acidity of the solution on the composition of solid products. IV. Formation of calcium vanadate(V) from the sodium metavanadate(V)-calcium nitrate-nitric acid-water system

Č. Gőczeová

Lehrstuhl für Anorganische Chemie der Naturwissenschaftlichen Fakultät der Komenský-Universität, 816 31 Bratislava

Abstract: The main product of the reaction system NaVO₃-Ca(NO₃)₂-HNO₃-H₂O at 20-60° was Ca₃V₁₀O₂₈.xH₂O (x = 16-17). In pure state it can be prepd. at 20° and 40° only. For lower acidification degrees it was contaminated by Ca(VO₃)₂.4H₂O and for higher values of acidification by a brown substance. The main component of the brown product was Na₂V₆O₁₆.3H₂O or NaHV₆O₁₆.xH₂O. A new double vanadate(V) of the compn. Na₄CaV₁₀O₂₈.19H₂O was prepd.

Full paper in Portable Document Format: 352a235.pdf (in German)

Chemical Papers 35 (2) 235–242 (1981)