Complex formation with the uranyl ion in chloride and chloride-fluoride melts by IR spectroscopy

Journal Article · Tue Mar 01 04:00:00 EST 1988 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6281140

Kokhryakov, A A; Nekrasova, N P; Komarov, V E

Solutions of uranyl dichloride in molten alkali-metal fluorides and their chloride-fluoride mixtures in various rations delta = (F/sup -/)/(UO/sub 2//sup 2 +/) were studied by IR emission spectroscopy. It was found that uranyl ions form complex groups UO/sub 2/Cl/sub 4//sup 2 +/ in molten alkali-metal fluorides. With the introduction of fluoride ions into the chloride melts the values of the v/sub 1/ and v/sub 3/ frequencies decrease with increase in the ratio delta to a certain value delta = delta/sub m/ characteristic of each melt, at which v/sub 1/ and v/sub 3/ remain unchanged. This results from substitution of the chloride ions in the uranyl complexes by fluoride ions. At the same time there is an increase in the coordination number of the uranyl ion from 4 to 5. With delta greater than or equal to delta/sub m/ the fluoride complexes UO/sub 2/F/sub 5//sup 3 -/ mostly exist in the melts.

• OSTI ID: 6281140
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 29:4; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
BINDING ENERGY
CESIUM CHLORIDES
CESIUM COMPOUNDS
CESIUM FLUORIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINATION
CHLORINE COMPOUNDS
COMPLEXES
COMPLEXOMETRY
COORDINATION NUMBER
COORDINATION VALENCES
ENERGY
ENERGY LEVELS
EXCITED STATES
FLUORIDES
FLUORINATION
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATION
INFRARED SPECTRA
MOLTEN SALTS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POTASSIUM FLUORIDES
SALTS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM FLUORIDES
SPECTRA
SYNTHESIS
URANIUM COMPLEXES
URANIUM COMPOUNDS
URANYL CHLORIDES
URANYL COMPLEXES
URANYL COMPOUNDS
URANYL FLUORIDES
VALENCE
VIBRATIONAL STATES