URANIUM. 33 



examined by Berzelius, was not a pure chemical 

 compound of sulphate of uranium and sulphate 

 of potash, but contained an excess of one of 

 them mechanically mixed : this indeed Berzelius 

 admits. Consequently, no inference can be 

 drawn from the analysis just stated. 



(2.) The potash-muriate of uranium was pre- 

 pared by dissolving muriate of potash in an ex- 

 cess of permuriate of uranium, and allowing the 

 salt to shoot spontaneously into crystals. The 

 crystals were four-sided oblique prisms, or rhom- 

 boidal tables. The salt was previously dried 

 in the temperature of 131. From 1-5 gramme 

 of this salt, he got 1*61 gramme of fused chic- 

 ride of silver, equivalent to 0-408 muriatic acid. 

 The protoxide of uranium was 0'82, equivalent 

 to 0'S5 peroxide of uranium, and the muriate of 

 potash was 0*412 gramme, equivalent to 0-2602 

 potash. According to this analysis the consti- 

 tuents of the salt are 



Muriatic acid . 0-4080 or 26-874- 

 Peroxide of uranium 0-8500 - 55-Q87 

 Potash . . 0-2602 - 17' 139 



1-5182 100-000 



Though Berzelius himself, owing to some inad- 

 vertancy, lias stated the constituents of this salt 

 to be 



VOL. II, C 



