[ELLSWORTH- I'UITEVIX] CAMSELLITE 



1 A 



Molecule Ratios 



MgO 45. 24 1 . 1220. 



Fe^Os 0.85 0.00531 



FeO 1 . 28 0. 0178 [ ^.il^ = 0. 5816 - 1 . 998 or 2 



MnO 1.09 0.0154 I 2 



AI2O3 0.29 0.0028^ 



0.5788 

 B2O3 40.40 0.5788....-^ =0.5788-0.994 or 1 



H.,0 + 110 10.55 0.5858.... — - — =0.5858-1. 006 or 1 



Average. .0.5821 



H2O-IIO . 0.26 



0.04 



K2O I 

 NasOf 



100. 00 



Theoretical Composition of Camsellite 2Mg0. B2O3. H2O. 



MgO : 47.87 



B2O3 41.44 



H2O 10.69 



100.00 



2A 3A 



CaO '. 29.77 Si02 40.80 



MgO 21 . 50 MgO 41 . 90 



FeO 0.30 Fe203 1.48 



MnO 0.68 FeO 0.13 



AI2O3 0.09 AI2O3 0.33 



C2O 47. 25 MnO 0. 06 



H2O 0.41 Cr203 0.01 



HsO+llO" 13.35 



100.00 H20-110° 1.84 



100 00 



Considering first the dolomite anal>'sis II we may deduct SiOo, 

 MgO and H2O to form chrysotile, assuming the true percentage of 

 water in chrysotile to be 14.84, as shown in III, and neglecting the 

 minor constituents of the latter (Fe203, FeO, AUOn, MnO) which would 

 in no case contribute more than 0.01% to the results. In making 

 the analysis the dolomite was dissolved in the smallest possible 

 amount of dilute hydrochloric acid added in small portions till action 

 ceased. The chrysotile thus set free was filtered off and treated 

 separately for magnesia and silica with results indicated in the analysis. 



—32 



