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Niobium dioxide
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<p>Niobium dioxide, is the <a href="/facts/Chemical_compound/37FXqqtv">chemical compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">formula</a> NbO2. It is a bluish-black <a href="/facts/Non-stoichiometric/DAssoN0e">non-stoichiometric</a> solid with a composition range of NbO1.94-NbO2.09. It can be prepared by reducing Nb2O5 with H2 at 800–1350 °C. An alternative method is reaction of <a href="/facts/Niobium_pentoxide/PNveR3v6">Nb2O5</a> with Nb powder at 1100 °C. </p>