ANTIMONY. 



ANTIMONY. 



From the specific heat of antimony, as determined by 

 Bunsen, Regnault, and others, and from the vapor density 

 of volatile compounds, as determined by Mitscherlich, Loe- 

 wig and Schweizer and others, it is certain that the atomic 

 weight must be about 120. [Gmelin-Kraut, L. c; and L. 

 Meyer, L c.) 



J. J. Berzelius : 129.03 (0 = 16) ; 806.452 (O = 100). 



100 parts of pure antimony, oxidized with nitric acid, 

 evaporated to dryness, and heated to redness, gave 124.8 

 antimonic antimoniate. The number of experiments and 

 the preparation of the metal are not given. [Poggend. Ann.^ 

 8, 1826, 23.) 



R. Schneider: 120.3 (O = 16); 751.9 (0 = 100). 



Determined by experiments on the reduction of native 

 antimonic ter-sulphide in a current of hydrogen. The only 

 foreign substance to be found in the mineral was silicic acid, 

 which was determined in each case. The temperature was 

 kept as low as possible, and the amount of sulphide vola- 

 tilized, and of that undecomposed by the process, was 

 determined. The mean composition, as ascertained by eight 

 experiments, was 71.48 antimony — extreme difference, 0.078; 

 and 28.52 per cent, sulphur. The atomic weight was cal- 

 culated from the mean for S = 200. {Poggend. Ann., 98, 

 1856, 293.) Schneider published a preliminary note in 

 Poggend. Ann., 97, 1856, 483, in which, from a portion of 

 the above-mentioned experiments, he deduced the value 

 120.25. 



H. Rose and Weber : 1W.626 (0 = 16). 



Rose published this determination expressly as a confirma- 

 tion of Schneider's value. Antimony ter-chloride was dis- 

 solved in water containing tartaric acid, and decomposed 

 by hydrogen sulphide. Sulphur was removed from the 

 filtrate by ferric sulphate, and the chlorine determined with 

 argentic nitrate. 2.162 antimony chloride were found equiv- 

 alent to 4.097 argentic chloride. [If Ag = 107.93 and CI 

 = 35.457, these data give Sb = 120.626 ; or, for O = 100, 

 Sb = 753.92.] Rose, adopting some other values gets 

 1508.67 [twice 754.34.] He also recalculates some earlier 



