Crystal structure of <a href="https://en.wikipedia.org/wiki/niobium_pentoxide" class="extiw" title="en:niobium pentoxide">en:niobium pentoxide</a>
<a href="//commons.wikimedia.org/wiki/User:Orci" title="User:Orci">Orci</a>
CC BY-SA 3.0
Eigenes Werk (own work), data source: B. M. Gatehouse and A. D. Wadsley: <i>The crystal structure of the high temperature form of niobium pentoxide</i>. In: Acta Cryst. (1964). 17, 1545-1554.