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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

Oxide-Niobate

[A2][O|Nb2O6] [Cubic Fd3m] Pyrochlore group

Oxycalciopyrochlore