Niobium

Symbol

Nb

Atomic number

41

Atomic mass	92.9064		Thermal conductivity	0.537
Atomic radius	2.09		Covalent radius	1.34
Density	8.55		Atomic volume	10.87
Melting point	2740		Oxidation states	5,3
Boiling point	5017		Stable isotopes	1
Heat of vapor.	682.0		Electronegativity	1.6
Heat of fusion	26.40		First ionization	6.88
Specific heat	0.26		Electrical conduct.	...

Electron configuration

Niobium

Niobium and tantalum commonly occur together in the iron -containing minerals columbite (FeNb₂O₆) and tantalite (FeTa₂O₆). Niobium with tantalum, manganese and iron form the oxides manganocolumbite and manganotantalite. Niobium is found in the minerals aeschynite and euxenite.

Niobium finds use as a constituent of alloy steels.

Niobium finds important application as a superconductor, particularly in combination with tin.

Niobium Nuclear Data