PLATINUM. 455 



Or, its constituents in the crystallized state may 

 be 



1 atom bipermuriate of platinum = 23-25 



1 atom muriate of soda .' . = 8-625 

 5 atoms water = 5'625 



S7'5 



The constituents, which ever supposition we 

 adopt, are the same ; the only difference consists 

 in the way in which they are arranged. If the 

 salt be a permuriate, 3 atoms of the water must go 

 to convert the platinum and sodium into oxides, 

 and the 3 atoms of chlorine into muriatic acid. 



3. Ammonio-muriate of platinum is formed by Analysis of 



. ., , ammonio- 



mixing sal-ammoniac with a concentrated sol u- muriate of 

 tion of muriate of platinum. This salt is soluble pla1 

 in water, though very slightly, and it crystallizes 

 in small grains seemingly octohedrons. Its co- 

 lour is a rich yellow, and it contains no water, 

 but is composed of 



2 atoms chlorine 9 1 



1 atom platinum 12 J 

 1 atom sal-ammoniac . . . 6 %> 75 



27-75 



The preceding analyses are sufficient to show 

 that 12 either denotes the atomic weight of pla- 

 tinum, or that it is a multiple of that weight. 

 Some other compound of platinum is still want- 



F f 4 



