200 



354. ANTIMONY OXYCHLORIDE. (Powder ofAlgaroth.) 



a. A white powder. 



Note. This is a mixture of the chloride and oxide in uncertain pro- 

 portions. 



355. TRIOXIDE. Sb 2 0,. 



-0 O 



a. Acicular crystals. 



Note. This specimen was prepared by Professor Eedwood. It was 

 obtained by burning antimony in the bottom of a large red-hot crucible. 



a. Pale greyish- white powder. (Antimonii Oxidum, B.P.) 

 c. Ditto, mixed with phosphate of calcium. (Pulvis 

 Antimonialis, B.P.) 



356. PENTOXIDE. 'Sb 2 6 . (Antimonic Oxide.) 



a. Anhydrous, a greyish-white powder. 



b. Hydrated, in white powder. (Antimonic Acid.) 



357. TERSDLPHIDE. Sb 9 S,. 



* o 



a. Anhydrous, in crystalline lumps, having a metallic 



lustre. (Crude Antimony.) 



Note. This specimen consists of the ore purified by fusion. For fine 

 specimens of the ore, see the central case, No. 8. 



6. The purified ore, powdered. (Black Antimony.) 



c. Roasted and fused. (Liver of Antimony.) 



d. Ditto, containing less sulphide and more oxide. (Glass 



of Antimony.) 



e. Purplish-red sandy powder. ( Crocus of Antimony.) 

 Note. Specimens c and d are very similar in appearance, but may be 



distinguished thus : Liver of antimony is opaque, and when rubbed gives 

 a brownish-red powder ; while glass of antimony is translucent, and by 

 transmitted light of a garnet-red colour ; when scratched, it gives a 

 whitish powder. Crocus of antimony consists of the scoria obtained in 

 reducing antimony, in powder. 



/. Hydrated, of a dark red-brown colour. (Antimonium 



Sulphuratum, B.P.) 



Note. According to Moss, the B.P. process does not yield an orange- 

 red powder. See P. J. [3] , vol. iii., pp. 443-446. The commercial arti- 

 cle generally consists of the yellow pentasulphide with excess of sulphur. 



g. Hydrated, of a bright red-brown colour. (Kermes 



Mineral, Pulvis Carthusianorum.) 



Note. For various methods of preparing mineral kermes, see Gmelin, 

 Chemistry, vol. 4, pp. 340-352 ; also Per. Mat. Med., vol. i., pp. 734-737. 



358. PENTASULPHIDE. Sb 2 S 6 . 



a. Orange-red powder, containing some oxide. (Golden 

 Sulphuret of Antimony, Antimonii Oxysulphuratum, 

 P. L., 1851. 



Note. This specimen has a reddish tint, probably owing to the presence 

 of a small quantity of the tersulphide. 



