CATALOGUE OF MINERALS. 



21 



No. 



Name. 



Formula. 



System of 

 crystallization. 



2. 



397. 

 398. 

 399. 

 400. 

 401. 

 402. 

 403. 

 404. 

 405. 

 406. 

 407. 

 408. 

 409. 

 410. 

 411. 

 412. 

 413. 

 414. 

 415. 

 416. 

 417. 

 418. 

 419. 



420. 

 * 



Titanates, Tungstates, Molybdates, Tantalates, 

 Columbates, Chromates, Yanadates. 



Ca Ti 1 



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



Ce,2r,Cb 1 

 CaW 



Perofskite 

 Pyrochlore * 

 Pyrrhite 

 Scheelite * 

 Scheeletine * 

 Tungstate of Copper ? f 

 Wulfenite * 

 Azorite 

 Fergusonite 

 Tyrite ? 

 Adelpholite 

 Tantalite 

 &quot;Wolfram * 

 Columbite * 

 Paracolumbite? f 

 Samarskite * 

 Mengite 

 Polymignyte * 

 Polycrase 

 2Eschynite 

 Euxenite 

 Yttro -Tantalite 

 Parathorite f 

 Rutherfordite f 

 In the yellow & = Y. In the black 



Cu,Ca,W 



fbMo 



Ca,Cb 



(Y, Ce) 6 Cb 



Y, Ce, Fe, U, Xl, 



??e, Mn Ta 



(F&quot;e, Mn) Ta 



2FeW+3MnWand4FeW+MnW 3 



(Fe, Mn) b 3 



Fe, U, and a metallic acid. 



Y,Ce,La,Fe,,Cb 



Pe, Zr, Ti 



Y, Ti, ^r, Fe, 1 e, 



2(Ce,La,Y,Fe) 

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



Fe,Ti? 

 Ce, Y, Ca, Ti 

 = Y, Ca, Fe. In the brown ft = Y, Ca. 



3 



3 



3 



3 



3 



3? 



3 



3 



4 



