428 Wells and W olden — Double Chlorides ', 



and it is probably due to this fact that no chloride of the 3 : 1 

 type could be obtained, 



Three separate crops gave the following results on analysis : 



Calculated for 

 Found. Cs 2 CdCl 4 . 



Caesium 51-55 51*26 51-51 51-35 



Cadmium 21*45 21*50 21*62 



Chlorine 27'03 27'14 26'90 27'03 



100-03 99-90 100-00 



1:1 Ccesium- Cadmium Chloride, CsCdCl r — This was ob- 

 tained only as a white crystalline powder. It is formed under 

 a very wide range of conditions, being produced by the re- 

 crystallization of the preceding salt, and continuing to appear 

 until the solution is saturated with cadmium chloride. It is 

 very difficultly soluble, especially in concentrated cadmium 

 chloride solutions, and it can be recrystallized unaltered from 

 water. Two samples, obtained under widely different condi- 

 tions, were analyzed. 



Found. Calculated for CsCdCl 3 . 



Caesium 38-11 37*60 37*84 



Cadmium 31*80 31*97 31*86 



Chlorine 30*17 30'25 30-30 



100-08 99-82 100-00 



3:1 Ccesium- Cadmium Bromide, Cs 3 CdBr 6 . — This com- 

 pound was obtained in the form of rectangular plates, some- 

 times as much as 10 mm in diameter. It can be made from a 

 solution of 80 s of caesium bromide and 4*5 g of cadmium 

 bromide in sufficient water to make a volume of 120 cc . On 

 recrystallization it gives CsCdBr 3 . 



Two separate samples were analyzed. 



Found. Calculated for Cs 8 CdBr 5 . 



Caesium 44*25 44*27 43*80 



Cadmium 11*88 12*29 



Bromine 43-79 43*77 43*91 



99-92 100-00 



2:1 Ccesium- Cadmium, Bromide, Cs^CdBr^ — This was ob- 

 tained in the form of slender needles, usually colorless, but 

 sometimes possessing a pale violet color for some unknown 

 reason. A solution 120 cc in volume, containing 3 s of cadmium 

 bromide and 52 g of caesium bromide gave this salt. When 

 recrystallized from water, it gives, like the preceding salt, the 

 compound CsCdBr 3 . 



