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Erbium, 68Er
| Atomic number (Z) | 68 |
| Phase at STP | solid |
| Melting point | 1802 K (1529 °C, 2784 °F) |
| Boiling point | 3141 K (2868 °C, 5194 °F) |
| Density (near r.t.) | 9.066 g/cm3 |
| when liquid (at m.p.) | 8.86 g/cm3 |
| Heat of fusion | 19.90 kJ/mol |
| Heat of vaporization | 280 kJ/mol |
| Molar heat capacity | 28.12 J/(mol·K) |