| Holmium | |
| Electrons per shell | 2,8,18,29,8,2 |
| Electron Configuration | [Xe] 4f11 6s2 ![]() |
| Ground state | 4I°15/2 |
| Atomic Volume | 18.7 cm3 mol-1 |
| Electronegativity | 1.23 |
| Magnetic ordering | No data |
| Mass magnetic susceptibility | 5.49 x 10-6 |
| Molar magnetic susceptibility | 9.05467 x 10-7 |
| Speed of sound | 2760 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 301 kJ mol-1 @25°C |
| Enthalpy of Fusion | 17.2 kJ mol-1 |
| Enthalpy of Vaporisation | 303 kJ mol-1 |
| Heat Capacity | 27.15 J mol-1 K-1 |
| Thermal Conductivity | 16.2 W m-1 K-1 |
| Thermal Expansion | 11.2 μm m-1 K-1 |
| Critcal Temperature | No data. |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Hardness |
|
| Brinell hardness | 746 MPa |
| Vickers hardness | 481 MPa |
Elastic Properties |
|
| Bulk modulus | 40.2 GPa |
| Poisson ratio | 0.231 |
| Shear modulus | 26.3 GPa |
| Young's modulus | 64.8 GPa |
Electrical Properties |
|
| Electrical resistivity | 9.4 x 10-7 Ω m |
| Electrical conductivity | 0.0124 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 2.0512 g Ah-1 |
| Valence Electron Potential (-eV) | 47.9 |
| Ionization Potential | |
| 6.018 | |
| 11.805 | |
| 22.843 | |
Energy Levels |
|
| 47.5467 KeV | |
| 46.6997 KeV | |
| 53.877 KeV | |
| 55.1278 KeV | |
| 53.7164 KeV | |
| 6.7198 KeV | |
| 6.6795 KeV | |
| 7.5253 KeV | |
| 7.911 KeV | |
| 7.6502 KeV | |
| 7.4699 KeV | |
| 8.747 KeV | |
| 9.0477 KeV | |
| 6.786 KeV | |
| 5.9398 KeV | |
Atomic Radii |
|
| 175 pm | |
| No data. | |
| No data. | |
| No data. | |
| No data. | |
| 176.2 pm | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 3 | VI | 1.041 | 0.901 | R |
| VIII | 1.155 | 1.015 | R | |
| IX | 1.212 | 1.072 | R | |
| X | 1.26 | 1.12 | ||
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
Oxidation States |
|
| Ho+3 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 580.7 | |
| 1139 | |
| 2204 | |
| 4100 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1432 | 1584 | (1775) | (2040) | (2410) | (2964) |