H. L. Wells — Cmium-Mercuric Halides. 233 



Cs 3 HgCl s Br 2 .- 



Calculated for 

 Found. Cs 3 HgCl 3 Br 2 . 



Caesium 4812 46-10 



Mercury 20-80 23-11 



Chlorine 16-24 12-30 



Bromine 11-82 18-49 



99 98 100-00 



The product was made with a very large excess of csesium 

 chloride, and it contained a considerable amount of the double 

 chloride. The analysis corresponds nearly to the formula 

 2Cs s HgCl 3 Br 2 +Cs 3 HgCl 5 . 



Cs Q SgOl 9 Br a . — Two products, which were made under 

 different conditions, were analyzed. 



Found. 



Caesium 40-34 38-86 



Mercury 28-79 2S"5S 



Chlorine . 12-94 10-48 



Bromine 17-43 22-07 



Calculated 



for 



Cs 



2 HgCl 2 B: 

 38-16 

 28-69 

 10-19 

 22-96 



fa- 



99-50 99-99 100 00 



One of these crops corresponds very closely to the formula, 

 while the other, made in the presence of a greater excess of 

 caesium chloride, contains a little Cs„HgCl 4 . 



C$HgCljE>Q\. — This has been obtained, like the chloride and 

 bromide, in dimorphous forms. One of these is cubic like the 

 other salts, while the second form crystallizes like the chloride 

 and not like the bromide. The color of both varieties is pale 

 yellow. 





^ 



Orthorhombic form. 



Calculated for 





Cubic form. 



Separate products. 



CsHgClBr 2 . 



Caesium . 



26-50 



26-97 26-74 26-01 



25-17 



Mercury 



.... 38-75 



40-21 40-05 38-91 



37-84 



Chlorine 



9-23 



11-32 11-42 8-53 



6 72 



Bromine 



2521 



21-63 21-94 26-65 



30-27 





99-69 



100-13 100-15 100-10 



100-00 



These products evidently contain some of the chloride. 

 The analyses of the first two samples of the orthorhombic salt 

 correspond closely to the formula, 2CsHgClBr 2 + CsHgCl 3 . 



CsHg 2 ClBr A . — Two separate products, made under different 

 conditions, were analyzed. 



