On the formation of uranium(V) species in alkali chloride melts / Volkovich Vladimir A.,Aleksandrov Denis E.,Griffiths Trevor R.,Vasin Boris D.,Khabibullin Timur K.,Maltsev Dmitri S. // PURE AND APPLIED CHEMISTRY. - 2010. - V. 82, l. 8. - P. 1701-1717.

ISSN/EISSN:

0033-4545 / нет данных

Type:

Article; Proceedings Paper

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 UO(2)Cl(4)(3-) ions were studied, including thermal decomposition and chemical reduction of uranyl(VI) chloro-species in various alkali chloride melts (LiCl, 3LiCl-2KCl, NaCl-KCl, and NaCl-2CsCl) at 550-850 degrees C. Decomposition of UO(2)Cl(4)(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(2)Cl(4)(3-) and UO(2). 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.

Author keywords:

molten salts; reduction; spectroscopy; uranium; uranyl LICL-KCL; ABSORPTION-SPECTROSCOPY; AQUEOUS-SOLUTION; X-RAY; MOLTEN; COMPLEXES; SPECTRA; IONS; MOLYBDENUM

DOI:

10.1351/PAC-CON-09-09-30

Web of Science ID:

ISI:000279994900013

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Note	42nd IUPAC Congress on Chemistry Solutions, Glasgow, SCOTLAND, AUG 02-07, 2009
Organization	Royal Soc Chem
Publisher	INT UNION PURE APPLIED CHEMISTRY
Address	104 TW ALEXANDER DR, PO BOX 13757, RES TRIANGLE PK, NC 27709-3757 USA
Language	English
Keywords-Plus	LICL-KCL; ABSORPTION-SPECTROSCOPY; AQUEOUS-SOLUTION; X-RAY; MOLTEN; COMPLEXES; SPECTRA; IONS; MOLYBDENUM
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Multidisciplinary
ResearcherID-Numbers	Volkovich, Vladimir/K-8339-2012 Maltsev, Dmitry/C-7431-2015
ORCID-Numbers	Volkovich, Vladimir/0000-0003-4438-1194 Maltsev, Dmitry/0000-0001-5678-1465
Number-of-Cited-References	37
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	17
Journal-ISO	Pure Appl. Chem.
Doc-Delivery-Number	626VH