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Niobate

[Nb5+O3]-, [Nb5+O4]3-

Normal niobate [NbO3]
[X2+][Nb2O6] [Orthorhombic Pcan] Tantalite group
Columbite-(Fe)
Columbite-(Mn)
Euxenite-(Y)
Normal niobate [NbO4]
[A][NbO4] [Tetragonal I4/a] Fergusonite group
Fergusonite-(Ce)
Fergusonite-(Nd)
Fergusonite-(Y)
[A][NbO4] [Monoclinic I2] β-Fergusonite group
β-Fergusonite-(Ce)
β-Fergusonite-(Nd)
β-Fergusonite-(Y)
[A][Nb2O8] [Trigonal P(-3)1m]
Liandratite
[A][B][Nb2O8] [Orthorhombic Pbcn]
Samarskite-(Y)
Samarskite-(Yb)
[A][B][Nb2O8] [Orthorhombic ???]
Ishikawaite
[A][B][Nb2O8] [Trigonal P(-3)1m]
Petscheckite
[A][B][Nb2O8] [Monoclinic ???]
Calciosamarskite
Hydroxide-Niobate
[A2][OH|Nb2O6] [Cubic Fd(-3)m] Pyrochlore group
Hydroxycalciopyrochlore
Oxide-Niobate
[A2][O|Nb2O6] [Cubic Fd3m] Pyrochlore group
Oxycalciopyrochlore