60 BULLETIN 149, UNITED STATES NATIONAL MUSEUM 



Metal: 



Grand total 3. 4876 



The sulphur is all stated as S and enough Fe deducted to form 

 troilite with all of it. The phosphorous is stated as P and the iron 

 sufficient to form orthosilicate with the excess of Si over MgO is 

 calculated to FeO. The metal then is found to make up 17.62 per 

 cent of the whole meteorite and to have the following composition: 



Net composition of metallic portion 



Per cent 



Iron (Fe) 91. 277 



Nickel (Ni) 8.270 



Cobalt (Co) . 426 



Copper (Cu).__. ; .009 



Phosphorous (P) . 018 



100. 000 



THE SOLUBLE SILICATE 



For the analysis of the soluble silicate portion, 2.0000 grams of the 

 unattracted powder were taken and treated in the same manner as 

 the preceding by digestion in aqua regia followed by hydrochloric 

 acid and sodium carbonate solution. The results were: 



Grams 



Dissolved 0. 9137 



Insoluble 1. 0863 



After separation of the silica the acid solution was made up to 250 cc. 

 in a calibrated flask at 38° C. Portions of 50 cc. were taken for 

 Mn, P2O5, and S. The remaining 100 cc. was used for FeO, AI2O3, 

 CaO, NiO, MgO, etc. The results obtained were as follows: 



Composition of soluble silicate portion 



Grams Grams 



P2O5 . 0065 



Fe .0784 



NiO . 0035 



S .0450 



9213 



SiOs 0. 2586 



Ti02 Trace. 



AI2O3 . 0050 



FeO . 1668 



CaO .0150 



MgO .3290 



MnO .0135 



Per cent, 100.83. 



Except for enough to combine with the sulphur to form troilite 

 the iron is calculated as FeO. The Ni is all determined as NiO in 

 this portion and the phosphorus as P2O5. 



