Oxidation States and Site Symmetries of CaF2:U Crystals

1 September 1970

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 53 (5) , 2031-2034
https://doi.org/10.1063/1.1674283

Abstract

Brown, green, yellow, and red CaF₂:U crystals were investigated by means of optical spectra and chemical analyses in order to determine the cause of the different colorations. Whereas earlier work claims the green coloration is due to U²⁺, we have shown it is due to U⁴⁺. Whereas earlier work claims the yellow coloration is due to U⁴⁺, we have shown it is due to U⁶⁺. The brown coloration appears to be due to U⁴⁺ with a different charge compensation that the green coloration.

Keywords

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