The euxenite group includes:
euxenite-(Y):
(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
fersmite:
(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
kobeite-(Y):
(Y,U)(Ti,Nb)2(O,OH)6 (?)
polycrase-(Y):
Y(Ti,Nb)2(O,OH)6
uranopolycrase:
UTi2O6
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