456 Wells and Metzger — C cesium- Antimonious Fluorides. 



Calculated for 



CsSbCl 6 . Found. 



Caesium 2854 29*14 



Antimony.. _ 25-75 26"43 



Chlorine 45*71 43-94 



We have extended our investigation to antimonic fluoride 

 and csesium fluoride, but the results were disappointing from 

 the fact that we were able to prepare but one double salt, 

 while Marignac* has described two potassium antimonic 

 fluorides. Either caesium in this case unexpectedly fails to 

 show as great a tendency to form double salts as does potas- 

 sium, or else we have failed to find the proper conditions for 

 producing them. 



The salt obtained by us apparently contains hydroxyl, 

 although prepared in strong hydrofluoric acid solutions, and 

 has the formula CsF*SbF 4 OH. It crystallizes on cooling 

 warm, rather concentrated solutions in the form of bundles of 

 transparent needles. Two crops gave the following analyses : 



Calculated for Found. 



CsSbF 5 OB. I. II. 



Caesium 36-44 37*77 



Antimony 32*87 31*82 31*72 



Fluorine .._ 26*03 25*54 26*18 



Hydroxyl 4-66 [4-87] 



Sheffield Scientific School, April, 1 90 1. 



* Liebig's Ann., cxlv, 237. 



