Abstract

The Raman spectrum of a saturated solution of uranyl chloride has been observed to consist of three lines having frequency shifts of 211 cm.-1, 865 cm.-1 and 909 cm-1. The intense line at 865 cm.-1 is highly polarised and accompanied by a faint companion. The lowest frequency line at 211 cm.-1 is also found to be a doublet. From the appearance of the Raman lines in the compound it has been concluded that the UO2 ++ ion has a symmetrical bent structure. The frequency shift of 865 cm.-1 coincides with the wave number separation of the fluorescent bands in the solid, suggesting that the subsidiary bands in fluorescence arise from the modulation of the principal electronic transition by the symmetric vibration of the uranyl group.

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