CATALOGUE OF MINERALS. 



21 



No. 



Name. 



Formula. 



System of 

 crystalliziition. 



2. Titanates, Tungstates, Molybdates, Tantalates, 

 Columbates, Chromates, Vanadates. 



397. Perofskite 



398. Pyrochlore * 



399. Pyrrhite 



400. Scheelite * 



401. Scheeletine * 



402. Tungstate of Copper? f 



403. Wulfenite* 



404. Azorite 



405. Fergusonite 



406. Tyrite? 



407. Adelpholite 



408. Tantalite 



409. -Wolfram * 



410. Columbite* 



411. Paracolumbite ? t 



412. Samarskite * 



413. Mengite 



414. Polymignyte * 



415. Polycrase 



416. .Sischynite 



417. Euxenite 



418. Yttro-Tantalite 



419. Parathorite t 



420. Rutherfordite t 



CaTi 1 

 4(Ca, Mg, Ce, La, Y, tJ) (Ti, Cb) 1 



Ce, 2r, Cb 1 



CaW 2 



tbW 2 

 Cu, Ca, W 



tbMo 2 



Ca, Cb 2 



(Y, Ce)6 Cb 2 



t, Ce, Fe, U, Si, Cb 2 



f e, Mn Ta 2 



(¥?e, Mn) Ta 3 

 2FeW+3MnWand4f^eW4-SlnW 3 



(Fe, Mn) ^'b 3 

 Fe, U, and a metallic acid. 



Y, Ce, La, Fe, ©, Cb 3 



3Pe,2r,Ti 3 



Y,Ti,Zr,¥'e,;ee, 3 



U,Ti,2r,¥'e,<ee,Cb 3 



2(Ce, La, Y, Fe) Cb +'^e, Ti' 3 



Ca, Mg, Y, Ce, La, U, Ti, Cb 3 ? 



* E^ (Ta, W, ^) 3 



Fe,Ti? 3 



Ce, Y, Ca, Ti 4 



* In the yellow :ft = Y. In the black il = Y, Ca, Fe. In the brown ft = Y, Ca. 



