The periodic Table
coloured by Discovery
coloured by States
Constants, Astronomy
Constants, Physics
SI Units
by Peder Axensten

Nb


in WebElements
in X-Ray info 		Nb, 41
niobium (English)
niobium, m. (French)
Niob, n. (German)
niobij (Russian)
niob (Swedish)

Symbol, numberNb, 41 (metal), Group: 5; 5B
Weight92.90638
In Nature
Discovered1801, by Charles Hatchett (England)
Density  [kg/m3]8570 [293 K] (solid)   7830 [2741 K] (liquid)   
Molar volume10.84 cm3
Melting Temperature2741 K   (2468 °C)   Enthalpy: 696.6 kJ/mol
Boiling Temperature5015 K   (4742 °C)   Enthalpy: 27.2 kJ/mol
Electrical resistance12.5E-8 [273 K] Wm
ThermalConductivity: 53.7 [300 K] W/Km     Expansion: 7.07E-6 /K
Ionisation [kJ/mol]
  M-->  M+--> M2+--> M3+--> M4+--> M5+--> M6+--> M7+--> M8+--> M9+-->M10+
Thermodynamics
State DfH° DfG° S° CpH H°298.15-H°0
[kJ/mol] [J/Kmol] [kJ/mol]
Isotopes
Mass In nature Half-life Spin m/mN NMM Decay
Nb