NIOBIUM (IV) OXIDE Chemical Properties

Melting point:

1901°C

Density 

5.9 g/mL at 25 °C(lit.)

form 

Powder

Specific Gravity

5.9

color 

white tetragonal crystals, crystalline or powder

Water Solubility 

Insoluble in water.

crystal system

square

Space group

I41/a

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
1.371	1.371	0.5985	90	90	90	1.125

CAS DataBase Reference

12034-59-2(CAS DataBase Reference)

EPA Substance Registry System

Niobium oxide (NbO2) (12034-59-2)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

WGK Germany 

3

TSCA 

Yes

HS Code 

2825908590

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

NIOBIUM (IV) OXIDE Usage And Synthesis

Chemical Properties

black powder

Uses

Niobium(IV) oxide is used as a reducing agent, which reduces carbon dioxide and sulfur dioxide to carbon and sulfur respectively. It finds application in dielectric material for electronic capacitors. It is also used for manufacturing metal niobium metal, in optical glass and in electronic industry.

Flammability and Explosibility

Not classified

Synthesis

In this procedure, pure Nb2O5 is reduced in an H2 stream at1000-1200°C. The reduction time for 1 g. of oxide (contained in a boat) is 1-2hours. Weight control is necessary, since prolonged heating athigh temperatures produces some further reduction to NbO.

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