54 



other constituents 0,2961 gr. The analysis, made by R. Mau- 

 zelius, gave the following result. 



, Molecular ratios 



CO^ 23,28 0,529 7 



ГАО2 0,20 0,001 



(7^2 O3 22,22 0,068 1^ 



La.^O.,, Di^O., etc. 24,04 0,073 | ^'^^^ *'^ 



Y.O, 



trace 









FeO 



0,35 



0,005 







MnO 



SrO 



trace 



21,03 



0,202 



■ 0,234 



3,1 



CaO 



1,-52 



0,027 , 







H,0 



6,52 





0,362 



4,8 



F 



trace 









Insoluble 



0,60 









99,76 



As will be observed, the molecular ratios of the carbon 

 dioxide, the sesquioxides, the monoxides , and the water ap- 

 proximate closely to 7:2:3:5 corresponding to the formula 



4Се(0Я)С0з + ZSrCO.^ + ЗЯ2О. 



Though this formula certainly is comparatively simple; yet 

 the composition of the mineral must be considered rather remark- 

 able. Besides the high percentage of strontium, which is note- 

 worthy, it is particularly the amount of water that merits ob- 

 servation. The latter can by no means be secondary, because the 

 mineral no doubt is absolutely fresh. According to the formula 

 two molecules of water enter into the group 4:Ce(H0]C0.^. The 

 part played by the remaining three molecules cannot for the 

 present be determined. That they ought to be regarded as 

 water of crystallization, is very improbable, as it has not been 

 ascertained that any part of the water should be more loosely 

 combined than the rest. 



