Uranyl ion fluorescence at 520 nm has been recorded from solutions that were excited only by radioactive emanations from trace concentrations of a U-232 impurity or added (225)actinium nitrate. This fluorescence had also been observed by others from (UO4)-U-233. 2H(2)O, but was attributed to a nuclear origin. Atomic oxygen emission was observed for a (UO4)-U-233. 2H(2)O sample, as was a brood visible emission originating from the fused silica tube that contained the radioactive sample.