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Reference.org
Niobium pentoxide
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<p>Niobium pentoxide is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">formula</a> <a href="/facts/Niobium/3zNI8AKp">Nb</a>2<a href="/facts/Oxide/DXtoVe1C">O</a>5. A colorless, insoluble, and fairly unreactive solid, it is the most widespread precursor for other compounds and materials containing niobium. It is predominantly used in alloying, with other specialized applications in <a href="/facts/Capacitor/hyowqv7n">capacitors</a>, optical glasses, and the production of <a href="/facts/Lithium_niobate/d98DlGny">lithium niobate</a>. </p>