Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/75672
Title: On the formation of uranium(V) species in alkali chloride melts
Authors: Volkovich, V. A.
Aleksandrov, D. E.
Griffiths, T. R.
Vasin, B. D.
Khabibullin, T. K.
Maltsev, D. S.
Issue Date: 2010
Citation: On the formation of uranium(V) species in alkali chloride melts / V. A. Volkovich, D. E. Aleksandrov, T. R. Griffiths et al. // Pure and Applied Chemistry. — 2010. — Vol. 82. — Iss. 8. — P. 1701-1717.
Abstract: Uranyl(V) species are normally unstable in solutions but are here shown to be stable in high-temperature chloride melts. Reactions leading to the formation of UO2Cl4 3- ions were studied, including thermal decomposition and chemical reduction of uranyl(VI) chlorospecies in various alkali chloride melts (LiCl, 3LiCl-2KCl, NaCl-KCl, and NaCl-2CsCl) at 550-850 °C. Decomposition of UO2Cl4 2- species under reduced pressure, with inert gas bubbling through the melt or using zirconium getter in the atmosphere results in the formation of UO 2Cl4 3- and UO2. Elemental tellurium, palladium, silver, molybdenum, niobium, zirconium, and hydrogen, as well as niobium and zirconium ions were tested as the reducing agents. The outcome of the reaction depends on the reductant used and its electrochemical properties: uranyl(VI) species can be reduced to uranyl(V) and uranium(IV) ions, and to uranium dioxide. © 2010 IUPAC.
Keywords: MOLTEN SALTS
REDUCTION
SPECTROSCOPY
URANIUM
URANYL
ALKALI CHLORIDE MELTS
CHEMICAL REDUCTION
CHLORIDE MELT
GAS BUBBLING
HIGH TEMPERATURE
MOLTEN SALT
REDUCED PRESSURE
REDUCTANTS
THERMAL DECOMPOSITIONS
URANYL
ZIRCONIUM ION
BUBBLE FORMATION
CHLORINE
ELECTROCHEMICAL PROPERTIES
FUSED SALTS
INERT GASES
IONS
MOLYBDENUM
NIOBIUM
ORGANIC POLYMERS
PALLADIUM
PYROLYSIS
REACTION KINETICS
REDUCING AGENTS
REDUCTION
SODIUM CHLORIDE
TELLURIUM
URANIUM ALLOYS
URANIUM DIOXIDE
ZIRCONIUM
URANIUM
URI: http://hdl.handle.net/10995/75672
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 77956145060
WOS ID: 000279994900013
PURE ID: 9048960
ISSN: 0033-4545
DOI: 10.1351/PAC-CON-09-09-30
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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