Niobium

Symbol NbAtomic 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

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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, euxenite and samarskite. Niobium is found with tantalum and aluminum in the oxide mineral simpsonite. Niobium is found with tantalum, manganese and iron in the oxide mineral tapiolite.

Niobium finds use as a constituent of alloy steels.

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

Atomic dataNuclear data
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Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 29
 
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Niobium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
41
92
91.907192
85.5907
796.95
7
...
37 My
EC
2.01
41
93
92.906377
86.5215
805.78
9/2
1.00
stable
...
...
41
94
93.907281
87.4538
813.01
6
...
24 ky
b-
2.04
Atomic data
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Periodic Table

Chemistry concepts

Reference
Rohlf
 
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