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Minerals that include Fe, Nb, O, U, Y
'Nohlite'
(Ca,Mg,Fe
2
,Y, etc·,U)
2
(Nb,Zr,Fe
3
)
3
O
10
Samarskite-(Y)
(Y,Fe
3+
,Fe
2+
,U,Th,Ca)
2
(Nb,Ta)
2
O
8
Yttrocolumbite-(Y)
Y(U
4+
,Fe
2+
)Nb
2
O
8
Yttrotantalite-(Y)
(Y,Ca,U
4+
,Fe
2+
)
2
(Ta,Nb)
2
O
8
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