Email this article Thermal stability of potassium fluorooxalatozirconates
- Authors: Godneva M.M.1, Mikhailova N.M.1, Kuznetsov V.Y.1, Zalkind O.A.1
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Affiliations:
- Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
- Issue: Vol 62, No 6 (2017)
- Pages: 827-835
- Section: Physical Methods of Investigation
- URL: https://journal-vniispk.ru/0036-0236/article/view/167786
- DOI: https://doi.org/10.1134/S0036023617060079
- ID: 167786
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Abstract
Thermal decomposition of fluorooxalatozirconates (FOxZs) K3ZrF5C2O4, K2ZrF4C2O4 ⋅ 2H2O, KZrF3C2O4 ⋅ 3H2O, and Zr4O3F2(C2O4)4 ⋅ 2H2O in air flow is studied. Crystalline K2ZrF4C2O4 and KZrF3C2O4 are detected. The decomposition onset temperature of anhydrous products goes down as the K/Zr molar ratio decreases. Disproportionation of potassium FOxZs both at the oxalate group yielding K2ZrF4C2O4 and ZrO2–x/2Fx, K2C2O4 and K3ZrF7 and at fluorine yielding K3ZrF7 and ZrO2 takes place. FOxZs can be used as precursors to produce fine-grained ZrO2 (baddeleyite).
About the authors
M. M. Godneva
Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Author for correspondence.
Email: motov@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk region, 184209
N. M. Mikhailova
Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: motov@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk region, 184209
V. Ya. Kuznetsov
Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: motov@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk region, 184209
O. A. Zalkind
Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: motov@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk region, 184209
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