294 



previously '), if only the following symbols be adopted there : 

 ./ = [T01J, o = [JiO], r = [lOu], . = [101], and «> = [Ï21|. 



In contradiction to the data given in literature, all three halo- 

 qenid'es must have the same content of crystallisation-water, and, 

 according to the analytical investigation, 1 HJJ. 



^ 3. 



RaCEMIC CIS-DlAMINO-DIETHYLENEDIAMlNIC-COBALTl-BROMIDE. 



Co 



{Fi?ie)j 



Br.^lH^O. 



m. 



m 



fig «2. 

 cisDianiino-diethylenediaminecobalti-bromide. 



The substance crystallises in flat and long brownish-red needles 

 prismatic in the direction of the c-axis, or in short, thick and small 

 crystals, having a slight elongation in the direction of the «-axis. 



Afonoclinic-prisma tic. 

 a -.'h :c=z 1,1177 -.1 : 0,8322. 



Forms observed: m = [110], and ^ = [011], large and lustrous. 

 Occasionally 711 is predominant, and eventually q. Furthermore: 

 /'j = [101] and r', = [101], almost equally large and giving good 

 reflexes; to = [121], commonly small, but also, if ^/ = [Oil] be 

 only slightly developed, occasionally almost equally large as r\ , 

 a = [100], very narrow, and mostly absent. The substance is com- 

 pletely isomorphous with the corresponding iodide. 



1) F. M. Jaeger, Zeits. f. Kryst. 39. 545. (1904). 



