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Hafnium, 72Hf
| Appearance | Steel gray |
| Atomic number (Z) | 72 |
| Phase at STP | Solid |
| Melting point | 2506 K (2233℃, 4051 ℉) |
| Boiling point | 4876 K (4603 ℃, 8317 ℃) |
| Density (at 20℃) | 13.281 g/cm3 |
| When liquid (at m.p.) | 12 g/cm3 |
| Heat of fusion | 27.2 kJ/mol |
| Heat of vaporization | 648 kJ/mol |
| Molar heat capacity | 25.73 J/(mol·K) |
| Specific heat capacity | 144.154 J/(kg·K) |
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