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Hey's Systematik

18 Niobates and Tantalates

18.01 Niobates and tantalates containing neither rare earths nor U

Bariopyrochlor(Var.v. Pyrochlor-Supergruppe) (Ba,Sr)(Nb,Ti)2(O,OH)7 kubisch Fd3m m3m 18.01.17

18.04 Niobates and tantalates containing both U and rare earths

Yttrotantalit-(Y) (Y,U,Fe2+)(Ta,Nb)(O,OH)4 orthorhombisch 18.04.03



Mineralsystematik-Übersicht