-J!! Gale and flicks — Sulphohalite. 



The mineral is readily soluble in water, fuses below red heat, 

 and has no water of crystallization. It contains large quantities 

 of sulphates, chlorides, fluorides and sodium, and a trace of 

 potassium. The analysis on a 0*24 gram sample was carried 

 out in platinum. In reporting the results enough sodium has 

 been calculated to the oxide to combine with the S0 3 to form 

 the molecule Na 2 S0 4 , and the remainder of the sodium 

 reported as Na. The analytical data are as follows (W. B. 

 Hicks, analyst) : 



Calculated for 

 2Na 2 S0 4 . NaCl.NaF 

 Per cent Per cent 



S0 3 _. 42-00 41-61 



Na 2 32-50 32-25 



Na 11*35 11-97 



CI 9-19 9-23 



F (by difference) 4'7l 4'94 



Loss at 200° C... 0-25 



100-00 100-00 



The result of the investigation identifies the specimen con- 

 clusively as sulphohalite, and confirms the previous analysis* 

 by Penfield of this rare mineral. 



* This Journal, (4), ix, p. 425, 1900. 



