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

Literature Information

Publication Date 2000-08-02
DOI 10.1039/B004464O
Impact Factor 3.676
Authors

Vladimir A. Volkovich, Trevor R. Griffiths, Derek J. Fray, Robert C. Thied


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Abstract

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.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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