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			Niobium
| 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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