Electronic absorption spectral study of the oxidation of uranium dioxide in chloride melts

Autor:	Derek J. Fray, Robert C. Thied, Trevor R. Griffiths, Vladimir A. Volkovich
Rok vydání:	2000
Předmět:	Aluminium chloride Uranium dioxide Inorganic chemistry General Physics and Astronomy Alkali metal Uranyl Chloride chemistry.chemical_compound chemistry medicine Uranium oxide Lithium chloride Physical and Theoretical Chemistry Uranyl chloride medicine.drug Nuclear chemistry
Zdroj:	Physical Chemistry Chemical Physics. 2:3871-3876
ISSN:	1463-9084 1463-9076
DOI:	10.1039/b004464o
Popis:	The reaction of uranium dioxide with melts of alkali metal chlorides (LiCl, LiCl–KCl and NaCl–CsCl) under oxidising conditions was followed spectroscopically between 550 and 700°C. The reaction proceeds ia initial intermediate uranyl chloro species and finally results in the formation of sparingly soluble alkali metal uranates(VI). The addition of aluminium chloride to the melt changes the mechanism of the oxidation so that a soluble uranyl chloride complex is the final product. The electronic absorption spectra of solutions of alkali metal uranates in chloride melts have been recorded for the first time. Solutions of monouranates are stable with time, but diuranates tend to react with alkali chloride melts to form monouranate species.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c4b527a59c67bff54ccfb0fc8bd0ff32 https://doi.org/10.1039/b004464o Zobrazit plný text záznamu