1825J Antimony with Chlorine and Sulphur. 41^ 



11'764 grammes (181'6 grs.) of chloride of silver, equivalent lo 

 2*902 grammes (44*8 grs.) of chlorine. The chloride of silver, 

 however, contained rather more sulphuret of silver than that 

 obtained in the analysis of the solid chloride. The result of this 

 analysis, therefore, gives per cent. 



Antimony 40*56 



Chlorine 59-44 



100-00 



which differs from the calculated result : the difference, how- 

 ever, is owing solely to the sulphuret of silver which remained 

 mixed with the chloride. 



If we pass dry chlorine over sulphuret of antimony containing 

 3 atoms of sulphur, we do not obtain the liquid chloride ; but 

 solid chloride of antimony and chloride of sulphur are formed. 

 The latter may be separated from the chloride of antimony by 

 heating them very gently in a matrass with a very narrow mouth ; 

 chloride of antimony alone remains. This is the same compound 

 that is formed in the analysis of grey copper by chlorine ; only 

 chloride of antimony and chloride of sulphur are obtained, the 

 first containing 3 atoms of chlorine, the second 2. No double 

 chloride is formed, and the chloride of sulphur remains on the 

 solid chloride of antimony. Heated so as merely to fuse the 

 chloride of antimony, the latter dissolves entirely in the chloride 

 of sulphur, and forms with it a homogeneous liquor ; but the 

 chloride of antimony separates in crystals on cooling. This is 

 one method of obtaining large crystals of this chloride ; but it 

 must be quickly filtered through blotting paper to separate, as 

 completely as possible, the adhering chloride of sulphur. 



It is remarkable that the liquid chloride of antimony is pro- 

 duced by the action of chlorine on metallic antimony only, and 

 that none is formed when the sulphuret of antimony is acted on 

 by chlorine.* 



II. Compounds of Antimony and Sulphur, 



I have made many experiments on the sulphurets of antimony, 

 but have only found three, which correspond with the oxides of 

 that metal. 



Sulphuret of antimony with 3 atoms of sulphur has different 



* I frequently passed chlorine over sulphuret of antimony, and always with the same 

 result. I fancied, for reasons to be stated in the f equel, that chloride of antimony with 

 5 atoms of chlorine was formed ; I only obtained, however, die chloride with 3 atoms, if I 

 drove off the chloride of sulphur. I was then led to think that 2 atoms of chlorine were 

 separated from the chloride of antimony, and had combined with the chloride of sulphur 

 to form, perhaps, a chloride with 4 atoms of chlorine. I, therefore, passed chlorine 

 over chloride of sulphur, and freed it carefully by distillation from the sulphur dissolved, 

 in order to discover such a chloride of sulphur. The colour of the chloride of sulphur 

 became indeed a little darker, but it underwent no other change, although tlie chlorine 

 was passed over it for a considerable length of time. 



2e2 



