URANIUM SALTS. 



89 



the spectrum. With the exception of a short description of a few of the 

 bands by Formanek, practically nothing has been done on the absorption 

 of uranous salts either in solution or in the crystalline condition. 



THE ABSORPTION SPECTRUM OF URANYL CHLORIDE. 



The absorption spectrum of uranyl chloride (crystals having the com- 

 position U0 2 C1 2 .H 2 at ordinary temperatures) has been mapped for solu- 

 tions in water, methyl and ethyl alcohols, in mixtures of these solvents and 

 in solutions with aluminium and calcium chlorides and for the anhydrous 



salt. 



Uranyl Chloride in Aqueous Solutions. 



The absorption spectrum (Plate 48, B) of uranyl chloride in water was 

 mapped for 1, 0.75, 0.50, 0.33, 0.25, 0.16, and 0.125 normal solutions, the 

 depth of layer being 3 mm. and the time of exposure to the Nernst glower 

 with a current of 0.8 ampere being 1 minute. The slit-width was 0.08 mm. 



The absorption spectra of the chloride and bromide are very similar, 

 the blue-violet absorption band being slightly stronger for the chloride. 

 The uranyl bands are very broad and diffuse for both salts, being slightly 



