Antimony with Chlorine and Sulphur. 129 
hydrogen: the sulphuret obtained, after being carefully dried, 
was decomposed by hydrogen. I obtained in one trial 1°305 
_ gramme (20°1 grs.) of antimony from 1:973 gramme (30°5 grs.) 
of sulphuret, and in another 0°977 gramme (15:1 grs.) of anti- 
mony from 1-468 gramme (22°7 grs.) of sulphuret. It is then 
composed, according to the first trial, of 
Antimony ..++++- 66°14 
Sulphur ...-++-- 33°86 
and, according to the other, of 
Antimony ....+. . + 66°55 
Sulphur ....-+--+- 33°45 
100:00 
The composition, when calculated, is 
Antimony .....+ ++ 66°72 
Sulphur ....-++-- 33°28 
100°00 
The sulphuret of antimony with 5 atoms of sulphur to 1 
of metal, which corresponds to antimonic acid, and which, by 
calculation, contains 61:59 of antimony and 38°41 of sulphur, 
is realized in the golden sulphuret of the shops. The different 
methods of its preparation are well known. It is also obtained 
if a current of sulphuretted hydrogen be passed through so- 
Iitions which contain antimonic acid: as, for example, that 
of the liquid chloride of antimony in water, to which tartaric 
acid has been added. The precipitate obtained is of an orange 
colour, paler than the precipitate from solutions of oxide of 
antimony, and does not change colour in drying, 
I analysed the golden sulphuret in two ways: I dried it at 
a heat insufficient to decompose it, till it no longer lost weight. 
It had then lost all its hygroscopic moisture. I generally made 
the analysis by passing a current of dry hydrogen over the 
heated golden sulphuret. Sulphuretted hydrogen was formed, 
but never water: sulphur was sublimated, and metallic anti- 
mony remained. I also analysed it by aqua regia, to which I 
added tartaric acid. I separated the undissolved sulphur, and 
precipitated the sulphuric acid by muriate of barytes: this 
method, however, is slower than’ that with hydrogen. An 
exact result is not obtained by fusing the golden sulphuret in 
a small matrass to convert it into sulphuret of antimony with 
3 atoms of sulphur, and calculating the composition of the 
former from the weight of the latter ; not only because the sul- 
phuret of antimony is not absolutely fixed, but also because 
some oxide of antimony is formed by the air in the matrass, 
Vol. 67. No. 334. Feb. 1826. R which 
