174 



FLUORESCENCE OF THE URANYL SALTS. 



TABLE 103. Uranyl rubidium sulphate: Rb 2 . U0 2 . (SOJi- 2H 2 0. Fluorescence at 186 C. 



Prepared by crystallizing a solution containing the two component salts in the proportions 

 of the double salt. The composition has been determined by Rimbach (Ber. d. d. Chem. Ges., 

 37, 479, 1904). The crystallization is in every way like the potassium salt, although the solubil- 

 ity is less and the crystals smaller. The preparation consisted of 6-sided plates about 0.02 by 

 0.04 mm. in size. 



