other
Niobium(Nb)
Phase at STP solid
Melting point 2750 K (2477 °C, 4491 °F)
Boiling point 5017 K (4744 °C, 8571 °F)
Density (near r.t.) 8.57 g/cm3
Heat of fusion 30 kJ/mol
Heat of vaporization 689.9 kJ/mol
Molar heat capacity 24.60 J/(mol·K)
Appearance gray metallic, bluish when oxidized

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