Aeschynite

minerals

allanite

monazite

fersmite

Images
Formulae:
aeschynite-(Ce): (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
aeschynite-(Nd): (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6
aeschynite-(Y): (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 most common

These are multiple oxides containing niobium or tantalum

Back to Minerals