211 



Analyses of steenstrupite. 



I И III 



Type III Type I Massive 



Tutop Agdlerkofia Kangerdluarsuk Kangerdluarsuk 



per cent per cent per cent 



SiO^_ 26-72 26-57 20-61 



Nb^O^ 4-37 j 



P2O5 8-19 6-81 4-53 



ThO^ 2-13 3-03 3-84 



CeO^ — — 17-85 



(7^2 O3 I 14-40 — 



La,0, 29-60 1 \ .^ 



Dk^O., J \ 15-90 / ■''^^ 



Г2О3 0-36 J 2-19 



Fe^O^ 2-67 4-55 5-18 



Mn^ O3 ..... . — 1-82 5-79 



MnO 6-60 2-32 — 



^2 O3 — I _ 0-40 



BeO . - \ ~"^^ 1-22 



CaO . . 2-33 4-03 4-22 



PbO — 0-46 1-02 



MgO 0-31 — — 



Na^O 11-23 8-34 ' 2-53 



K,0 — 0-50 — 



H,_0 3-45 7-58 12-73 



F 1-24 — — 



99-20 99-07 99-21 

 -f- Equivalent of 



for i^ 0-52 



98-68 



Concerning the method of the analysis Christensen 

 states the following: 



14* 



