OXIDATION STATES AND COMPLEX IONS OF URANIUM IN FUSED CHLORIDES AND NITRATES

Journal Article · Sun Mar 01 04:00:00 EST 1959 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(59)80233-5· OSTI ID:4261398

Gruen, D M; McBeth, R L

Oxidation states of uranium in fused LiCl-KCl eutectic, pyridinium chloride, and LiNO/sub 3/-KNO/sub 3/ eutectic were charaeterized spectrophotometrically. The (III), (IV), and (VI) oxidation states of uranium are stable in LiCi-KCl eutectic. The (IV) and (VI) oxidation states have been observed in pyridinium chloride. In LiNO/sub 3/KNO/sub 3/ eutectic the (III) and (IV) states are oxidized to the (VI) oxidation state. It was found that Al as well as U metal reduces U(N) to U(III) while Mg metal reduces U(III) to U(O) in LiCl-KCl eutectic. On the basis of these experiments the U(IIl)-U(O) standard potential versus a l M Pt reference electrode can be predicted to lie between- 1.77 and-258 v. The U(IV)-U(III) potential versus the same electrode can be expected to be more positive than -1.77 v. Spectrophotometric evidence indicates that U(IV) changes its co-ordination number from six to eight in going from fused pyridinium chloride to LiCl-KCl eutectic. Changes were observed in the UO/sub 2/ (II) spectrum on addition of chloride ion to UO/sub 2/(II) solutions in LiNO/sub 3/-KNO/sub 3/ eutectic which were correlated with the formation of chlorocomplexes of uranyl ion. (auth)

• Research Organization: Argonne National Lab., Lemont, Ill.
• NSA Number: NSA-13-013292
• OSTI ID: 4261398
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM
CHEMISTRY
CHLORIDES
COMPLEXES
FUSED SALTS
IONS
LITHIUM CHLORIDES
LITHIUM NITRATES
NITRATES
OXIDATION
PHOTOMETRY
POTASSIUM CHLORIDES
POTASSIUM NITRATES
PYRIDINES
SPECTROSCOPY
URANIUM
URANYL COMPOUNDS