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Hoelzel Classification

4 OXIDES

4.C R2O3 Sesquioxides

4.CH Pyrochlore-Group, Nb-dominant on the B-site

4.CH. Pyrochlore-Group, Nb-dominant on the B-site
Pyrochlore group A2Nb2(O,OH)6Z kubisch Fd3m m3m 4.CH.

4.CH.0

Fluornatropyrochlore (Na,Pb,Ca,REE,U)2Nb2O6F kubisch Fd3m m3m 4.CH.020
Oxynatropyrochlore (Na,Ca,U)2Nb2O6(O,OH) 4.CH.040

4.CH.1

Hydroxycalciopyrochlore (Ca,Na,U,☐)2(Nb,Ti)2O6(OH) kubisch Fd3m m3m 4.CH.110
Hydroxymanganopyrochlore (Mn,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) kubisch Fd3m m3m 4.CH.119
Fluorcalciopyrochlore (Ca,Na)2(Nb,Ti)2O6F kubisch Fd3m m3m 4.CH.120
Oxycalciopyrochlore Ca2Nb2O6O 4.CH.140
Stibiobetafite(Var.v. Pyrochlore group) (Sb3+,Ca)2(Ti,Nb,Ta)2(O,OH)7 kubisch Fd3m m3m 4.CH.141

4.CH.3

Fluorstrontiopyrochlore (Sr,☐)2Nb2(O,OH)6F 4.CH.320

4.CH.4

Oxyplumbopyrochlore Pb2Nb2O6O 4.CH.440
Plumbopyrochlore(Var.v. Pyrochlore group) (Pb,Y,U,Ca)2-xNb2O6(OH) kubisch Fd3m m3m 4.CH.461
Kenoplumbopyrochlore (Pb,☐)Nb2 O6(☐,O) 4.CH.480

4.CH.6

Oxyyttropyrochlore-(Y) (Y,☐) 2Nb2O6O 4.CH.640
Yttropyrochlore-(Y)(Var.v. Pyrochlore group) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 kubisch 4.CH.661

4.CH.9

Uranopyrochlore(Var.v. Pyrochlore supergroup) (Ca,U,Na,Ce)2(Nb,Ta)2(O,OH,F)7 kubisch Fd3m m3m 4.CH.911
Strontiopyrochlore(Var.v. Pyrochlore group) Sr0.6Nb2(O,OH)7 kubisch Fd3m m3m 4.CH.912
Ceriopyrochlore-(Ce)(Var.v. Pyrochlore supergroup) (Ca,Ce,Y,Na)2(Nb,Ta)2(O,OH,F)7 kubisch Fd3m m3m 4.CH.913
Bismutopyrochlore(Var.v. Pyrochlore supergroup) (Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)·nH2O kubisch Fd3m m3m 4.CH.914
Fluorkenopyrochlore (☐,Na,Ce,Ca)2(Nb,Ti)2O6F 4.CH.920
Hydropyrochlore (H2O,☐)2Nb2(O,OH)6(H2O) kubisch Fd3m m3m 4.CH.961
Bariopyrochlore(Var.v. Pyrochlore supergroup) (Ba,Sr)(Nb,Ti)2(O,OH)7 kubisch Fd3m m3m 4.CH.962



Mineralsystematik-Übersicht