247 



Cö-salt^); Werner's supposition of their being ciibic and isoinorplions 

 with NaCU is erroneous, as has been alread}'' said. 



Calculated -. 



52° 9' 

 60 

 37 51 



Angles : Observed : 



c.T =(00oi):(ioTi)=* 37051' 



m: r = (1010) : (1011) = 52 9 

 m.-m = (10iO):(OlTO)= 60 

 c:x =(0001):(1Ï01)= 38 1 



No distinct cleavability was found. 



The crystals are uniaxial; their birefringence is negative. Tlie 

 interference-image is sometimes slightly disturbed, as was observed 

 also in the case of tlie (.c'-salt. 



The corresponding bromide was completely isomorphous with the 

 chlo7'ide here described. 



\ 4. Racemic Tri-ethylenediamine-chromi-chloride. 



\Cr{Eine\]Ck-\-^H,0. 



Beautiful, orange, very transparent and lustrous prismatic crystals, 

 which commonly only exhibit the forms c and m. Occasionally ajso 

 hexagonal plates occur parallel to |0001|; once a form r = [1011| 

 was observed as a very narrow truncation of the edge c -. m. 



m 



rt^ 



C' 



JIV 



—I 



-Fig. ,3. 

 Racemic Tri-ethyleuediamine-cbromi-chloride. 



Ditrigo7ial-scalenohedral. 

 a: c = l: 0,6930. 

 Forms observed: c := {0001 1, and m = |10T0|, both very lustrous, 

 while sometimes c, sometimes however m is developed predominantly; 

 r=:[10Tli, mostly absent, and in all cases very narrow. 



I) F. M. Jaeger, Proceed. Kon. Acad. Amsterdam, 18. 50. (1915). 



