138 Hillebrand and Ransome — Carnotite and Associated 



II. 





a 



b 



c 



a 



b 



* 



j.jlj.. 



Insol. 



7-10* 



8-34f 



19'OOJ 



10-33§ 



II 





1 



TT0 3 .... 



54-89 



52-25 



47-42 



54-00 



52-28 





20-51 



V.O.— - 



18-49 



18-35 



15-76 



18-05 



17-50 





7-20 



P.O..— 



•80 



•35 



•40 



•05 



tr. 





none 



As 2 6 ... 



tr. 



•25 



none 



none 



none 





none 



Al a O s — 



•09 



? 



•08 



•29 



? 





•08? 



Fe O 3 --- 



•21 



1-77 



•72 



•42 



3-36 





•25 



CaO .... 



3*34 



2-85 



2-57 



1-86 



1-85 





1-64 



SrO ..... 



•02 



? 



? 



tr. 



tr. 





? 



BaO .... 



•90 



•72 



•65 



2-83 



3-21 





■29 



M^O ... 



•22 



•20 



•24 



•14 



•17 





•07 



K„0 .... 



6-52 



6-73 



6-57 



5-46 



5-11 





1-51 



Na 2 ... 



•14 



•09 



•07 



•13 



•02? 





•01 



Li 2 0.._. 



tr. 



? 



9 



tr. 



? 





? 



H 2 105° 

 H 2 350° 



2-43 

 2-11 



2-59 

 3'06 



1-85 

 2-79 



3-16 

 2-21 



4-52 ) 

 3-49 I 



total 

 H 2 Oin 



1-85 



1-64 (300°) 













ore 





H 2 O + 350 



none 



none 



none 



none 







•19( + 300°) 



PbO.... 



•13 



•25 



•18 



•07 







•09 



CuO .... 



•15 



•20 



•22 



tr. 







tr. 



so 3 .... 



none 



•12 



•18 



none 







none 



Mo0 3 ... 



•18 



•23 



■18 



•05 







•04 



SiO„ .... 



•15 



•06 



•13 



•20 







•07 



Tio;.... 



•03 



•10 



? 



? 







•06? 



co 2 



•56 



•33 



none 



none 









98-46 98-84 99-01 99"25 



* Containing -54H 2 0, -09V 2 O 3 . 



f The insoluble matter had the following composition: Si0 2 5*18, V 2 3 -21, 

 P 2 5 -09, K 2 -26, Na 2 -04, H 2 (105°) -56, (350°) -32 ( + 350°) -48, A1 2 3 , Ti0 2 , 

 Cr 2 3 , etc , by diff. l - 20. The S0 3 of this analysis is not combined with BaO, for 

 it is wholly extracted by dilute acids. Once in solution the acid used is sufficient 

 to prevent its immediate precipitation as BaS0 4 by union with some of the barium 

 present. The same holds true for the S0 3 of I-c. 



% This material was obtained by floating off the finer matter, allowing it to 

 settle, collecting on a Gooch filter, and drying it in a current of air drawn through 

 the crucible. The insoluble matter held in addition to 16"41 quartz and silicates 

 including -39 V 2 3 and a little U0 3 ), H 2 (105°) -83, (300°) -73, ( + 300°) 1-03; 

 total H 2 2-59. 



£ Containing -16 V 2 3 and 1-90 H 2 0. 



|| The insoluble matter contained besides quartz and silicates '25 V 2 3 , '21K 2 0, 

 •05 Na 2 0. 



^[ This analysis was made purposely on a relatively poor ore, furnished by 

 Messrs Poulot and Voilleque, with the object of determining, if possible, the com- 

 position of the vanadiferous silicate which it contained (see p. 143). The data for 

 calculating the H 2 values of both analyses are as follows: 



After extraction of After extraction of 

 carnotite by cold. residue by hot nitric 



Ore. dilute nitric acid. acid, sod. carb., etc. 



(a) (b) (c) 



H 2 105° 3 53 1-68 "02 



H 2 300° 2-11 -47 -03 



H 2 O + 300° -83 -64 -02 



6-47 279 -07 



a-b furnishes the values for the carnotite as shown in analysis III ; b-c gives 

 those for the less soluble silicate (p. 143). 



