84 Chemical Examination of Arseniet of Antimony. 



31. ARSENIET OF ANTIMONY. 



Although this species has not yet found its way into 

 mineralogical treatises, it is by no means uncommon. The 

 specimen in my collection, comes from Allemont, in the 

 department of Isere, in France. I got it from Mr. Heuland. 



It is not crystalized ; but has a bluish-gray color, and the 

 metallic lustre. Texture fine, granular. Sectile, but not 

 malleable. Soft. 



Specific gravity 6*130. Not altered by exposure to the air. 



Before the blow-pipe it fuses and sublimes in a white smoke, 

 having a strong arsenial smell, leaving scarcely any visible 

 residue. 



Its constituents were found to be, 



Antimony, ------ 46*012 



Arsenic, 38*508 



Loss^ 14*880 



100*000 



This indicates a compound of, 



1 atom antimony, - - - - - - 6*5 



1 atom arsenic, ------ 4.75 



10.25 



The specific gravity is considerably above the mean, which 

 is 6*056, showing that the two metals have contracted in the 

 act of union. This probably implies a considerable affinity 

 to exist between them. 



