Niobium dioxide

Niobium dioxide
Names
IUPAC name
niobium(IV) oxide, niobium dioxide
Other names
niobium(IV) oxide, columbium dioxide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.632 Edit this at Wikidata
EC Number
  • 234-809-7
  • InChI=1S/Nb.2O
  • O=[Nb]=O
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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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]

  1. ^ a b c C. K. Gupta, A. K. Suri, S Gupta, K Gupta (1994), Extractive Metallurgy of Niobium, CRC Press, ISBN 0-8493-6071-4
  2. ^ Pradyot Patnaik (2002), Handbook of Inorganic Chemicals,McGraw-Hill Professional, ISBN 0-07-049439-8