Composition and stability constants of Np(V) fluoride complexes in chloride-fluoride melts |
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| Authors: | Yu. A. Barbanel’ R. B. Dushin V. V. Kolin V. P. Kotlin S. N. Nekhoroshkov |
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| Affiliation: | (1) Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, OX1 3QZ Oxford, England; |
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| Abstract: | The absorption spectra of the NpO2+ ion in the region of the 3 H 5← 3 H 4 magnetic dipole transition (∼1650 nm) in chloride-fluoride melts based on the eutectics NaCl-KCl-CsCl, NaCl-CsCl, and RbCl-CsCl at 650–750°C were recorded. The equilibrium concentrations of neptunium fluoride complexes in these melts were determined from the relative intensities of the NpO2+ absorption bands. Existence of the complexes [NpO2Cl3F]3− and [NpO2Cl2F2]3− was established, and the step stability constants of these complexes in melts of various cationic compositions were calculated. |
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