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Niobium dioxide
Chemical compound / From Wikipedia, the free encyclopedia
Niobium dioxide, is the chemical compound with the formula NbO2. It is a bluish-black non-stoichiometric solid with a composition range of NbO1.94-NbO2.09.[1] It can be prepared by reducing Nb2O5 with H2 at 800–1350 °C.[1] An alternative method is reaction of Nb2O5 with Nb powder at 1100 °C.[2]
Quick Facts Names, Identifiers ...
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Names | |
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IUPAC name
niobium(IV) oxide, niobium dioxide | |
Other names
niobium(IV) oxide, columbium dioxide | |
Identifiers | |
3D model (JSmol) |
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ECHA InfoCard | 100.031.632 ![]() |
EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |
NbO2 | |
Molar mass | 124.91 g/mol |
Appearance | bluish black solid |
Melting point | 1,915 °C (3,479 °F; 2,188 K)[1] |
Structure | |
Tetragonal, tI96 | |
I41/a, No. 88 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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