ORDER IX. PRISMATIC ANTIMONY. 



separated ; faces of composition striated agreeably 

 to the faces of cleavage. 



OBSERVATIONS. 



1. According to KLAPROTH, the rhombohedral Antimony 

 consists of 



Antimony 98-00. 



Silver 1-00. 



Iron 0'25. 



Before the blowpipe it melts quickly into a globule, and 

 continues to burn, when heated to redness, even if the 

 blast is suspended. It emits copious white fumes, which 

 are deposited round the globule ; first yellowish-white oc- 

 tahedrons, probably of antimonious acid, are formed, and 

 then snow-white prismatic crystals of oxide of antimony, 

 with which at last the whole globule is covered. Some of 

 the varieties leave a globule of silver, when the contents 

 of antimony have been entirely volatilized. It crystallises 

 readily from fusion. 



2. The rhombohedral Antimony is found in veins travers- 

 ing ancient rocks, and is principally accompanied by other 

 species that contain antimony. The Antimony Ochre, which 

 also occurs with it, seems to be the product of its decom- 

 position. 



3. The present, species was first discovered at Sahlberg 

 near Sahla in Sweden, and afterwards at Allemont in 

 Dauphiny, where it occurs in curved lamellar compound 

 varieties, which consist of granular ones, and at Andreas- 

 berg in the Hartz. 



2. PRISMATIC ANTIMONY. 



Octahedral Antimony. JAM. Syst. Vol. III. p. 113. 

 Prismatic Antimony or Antimonial Silver. Man. p. 

 259. Antimonial Silver. PHILL. p. 286. Spiesglas- 

 Silber. Arsenik-Silber. WERN. Hoffm. H. B. III. 2. S. 

 4G. 48. Silberspiessglanz. HAUSJI. I. S. 126. Anti- 

 mon-Silber. LEONH. S. 204. Argent antirnoniaL 



