Niobium  Physical & General Properties
Atomic number				(Z) 41
Atomic radius				146 pm
Electronegativity according to Pauling				1.6
Density				8.57 g/cm3
Melting point				2468 ℃
Boiling point				4742 ℃
Thermal Conductivity				0.537 W/cm/K @ 298.2 K
Electrical Resistivity				12.5 microhm-cm @ ℃
Electronegativity				1.6 Paulings
Specific Heat				0.064 Cal/g/K @ 25 ℃
Heat of Fusion				6.5 Cal/gm mole
Discovered by				Charles Hatchett in 1801