Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Erbium | |
| Electron Configuration | 2,8,18,30,8,2 |
| Electron Configuration | [Xe]] 4f12 6s2 |
| Electronegativity | 1.24 |
| Enthalpy of Fusion | 17.2 kJ mol-1 |
| Enthalpy of Vaporisation | 280 kJ mol-1 |
| Heat Capacity | 28.12 J mol-1 K-1 |
| Thermal Conductivity | 14.5 W m-1 K-1 |
| Thermal Expansion | 12.2 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 0.860 Ω m |
| Speed of sound | 2830 m s-1 |
| Young's modulus | 69.9 GPa |
| Shear modulus | 2830 GPa |
| Bulk modulus | 44.4 GPa |
| Poisson ratio | 0.237 |
| Vickers hardness | 589 MPa |
| Brinell hardness | 814 MPa |
| Atomic Radii |
|
| Atomic Radius
|
175 pm |
| Bohr Radius
|
226 pm |
| Covalent Radius
|
0 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Er+3 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
588.7 |
| M+ - M2+ |
1151 |
| M2+ - M3+ |
2194 |
| M3+ - M4+ |
4115 |