Niobium oxide
# Niobium oxide

Niobium oxide, sometimes called columbium oxide, may refer to:

* Niobium monoxide (niobium(II) oxide), NbO
* Niobium dioxide (niobium(IV) oxide), $NbO_2$
* Niobium pentoxide (niobium(V) oxide), $Nb_2O_5$

In addition to the above, other distinct oxides exist

* general formula $Nb_{3n+1}O_{8n−2}$ where n ranges from 5 - 8 inclusive, e.g. $Nb_8O_{19}$ $(Nb_{16}O_{38}).$
* $Nb_{12}O_{29}$ and $Nb_{47}O_{116}$

Natural niobium oxide is sometimes known as niobia.

