Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Thulium | |
| Electron Configuration | 2,8,18,31,8,2 |
| Electron Configuration | [Xe]] 4f13 6s2 |
| Electronegativity | 1.25 |
| Enthalpy of Fusion | 18.4 kJ mol-1 |
| Enthalpy of Vaporisation | 247 kJ mol-1 |
| Heat Capacity | 27.03 J mol-1 K-1 |
| Thermal Conductivity | 16.9 W m-1 K-1 |
| Thermal Expansion | 13.3 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 676 Ω m |
| Young's modulus | 74.0 GPa |
| Shear modulus | GPa |
| Bulk modulus | 44.5 GPa |
| Poisson ratio | 0.213 |
| Vickers hardness | 520 MPa |
| Brinell hardness | 471 MPa |
| Atomic Radii |
|
| Atomic Radius
|
175 pm |
| Bohr Radius
|
222 pm |
| Covalent Radius
|
0 pm |
| Van der Waals
|
0 pm |
| Oxidation States |
|
| Main
|
Tm+3 |
| Other
|
Tm+2 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
596.7 |
| M+ - M2+ |
1163 |
| M2+ - M3+ |
2285 |
| M3+ - M4+ |
4119 |