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Hölzel Systematik

4 Oxide

4.D Dioxide

4.DJ Titanates, Niobates and Tantalates, C large, V medium ò 2

4.DJ.1 Euxenit-Gruppe

Euxenit-(Y) Y(Nb0.5Ti0.5)2O6 orthorhombisch Pbcn mmm 4.DJ.100
Polykras-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 orthorhombisch Pbcn mmm 4.DJ.110
Uranopolykras (U,Y)(Ti,Nb,Ta)2(O,OH)6 orthorhombisch Pbcn mmm 4.DJ.120
Fersmit (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 orthorhombisch Pbcn mmm 4.DJ.130
Tanteuxenit-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 orthorhombisch Pbcn mmm 4.DJ.150

4.DJ.2 other Titanates

Kobeit-(Y) (Y,U)(Ti,Nb)2(O,OH)6 kubisch 4.DJ.240
Yttrokrasit-(Y) (Y,Th,Ca,U)(Ti,Fe3+)2(O,OH)6 4.DJ.260
Lucasit-(Ce) (Ce,La)Ti2(O,OH)6 monoklin I2/a 2/m 4.DJ.280

4.DJ.3 Aeschynit-Gruppe

Aeschynit-(Ce) (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 orthorhombisch Pbnm mmm 4.DJ.300
Aeschynit-(Y) (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 orthorhombisch Pbnm mmm 4.DJ.310
Aeschynit-(Nd) (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 4.DJ.320
Tantalaeschynit-(Y) (Ca,Y,Ce)(Ta,Ti,Nb)2O6 orthorhombisch Pbnm mmm 4.DJ.330
Nioboaeschynit-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 orthorhombisch Pbnm mmm 4.DJ.340
Nioboaeschynit-(Y) [(Y,Ln),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 orthorhombisch Pbnm mmm 4.DJ.350
Rynersonit Ca(Ta,Nb)2O6 orthorhombisch Pbnm mmm 4.DJ.370
Vigezzit (Ca,Ce)(Nb,Ta,Ti)2O6 orthorhombisch Pbnm mmm 4.DJ.380

4.DJ.4 Fergusonit-Gruppe

Yttrotantalit-(Y) (Y,U,Fe2+)(Ta,Nb)(O,OH)4 orthorhombisch 4.DJ.400
Fergusonit-(Y)-β YNbO4 monoklin I2/a 4.DJ.410
Fergusonit-(Nd)-β (Nd,Ce)NbO4 4.DJ.420
Fergusonit-(Ce)-β (Ce,La,Nd)NbO4 monoklin I2/a 2/m 4.DJ.430
Takanawait-(Y) Y[Ta,Nb]O4 monoklin I2/a 2/m 4.DJ.440
Fergusonit-(Y) YNbO4 tetragonal I41/a 4/m 4.DJ.450
Formanit-(Y) YTaO4 monoklin P2/a 2/m 4.DJ.460
Iwashiroit-(Y) YTaO4 monoklin P2/a 2/m 4.DJ.465
Fergusonit-(Ce) CeNbO4 tetragonal I41/a 4/m 4.DJ.470

4.DJ.5 Other Niobates, Tantalates

Irtyshit Na2(Ta,Nb)4O11 hexagonal P63/m, P63 6/m, 6 4.DJ.500
Cesplumtantit (Cs,Na)2(Pb,Sb3+)3Ta8O24 tetragonal 4.DJ.510
Ungursait Ca(Ta,Nb)4O11 hexagonal P63, P63/m 6, 6/m 4.DJ.530
Calciotantit CaTa4O11 hexagonal P6322 622 4.DJ.540
Petscheckit U4+Fe2+Nb2O8 trigonal P31m 3m 4.DJ.560
Liandratit U6+(Nb,Ta)2O8 trigonal P31m 3m 4.DJ.570
Muratait-(Y) (Y,Na)6(Zn,Fe3+)5(Ti,Nb)12(O,F,OH)43 kubisch F43m 43m 4.DJ.580
Changbaiit PbNb2O6 trigonal R3m 3m 4.DJ.590

4.DJ.6 Brannerit-Gruppe

Brannerit (U,Ca,Y,Ce)(Ti,Fe)2O6 monoklin C2/m 2/m 4.DJ.600
Orthobrannerit U4+U6+Ti4O12(OH)2 orthorhombisch P2122 222 4.DJ.620
Thorutit (Th,U,Ca)Ti2(O,OH)6 monoklin C2/m 2/m 4.DJ.640



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