| Neodymium | |
| Electrons per shell | 2,8,18,22,8,2 |
| Electron Configuration | [Xe] 4f4 6s2 ![]() |
| Ground state | 5I4 |
| Atomic Volume | 20.6 cm3 mol-1 |
| Electronegativity | 1.14 |
| Magnetic ordering | Ferromagnetic |
| Mass magnetic susceptibility | 4.8 x 10-7 |
| Molar magnetic susceptibility | 6.9235 x 10-8 |
| Speed of sound | 2330 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 322 kJ mol-1 @25°C |
| Enthalpy of Fusion | 7.11 kJ mol-1 |
| Enthalpy of Vaporisation | 328 kJ mol-1 |
| Heat Capacity | 27.45 J mol-1 K-1 |
| Thermal Conductivity | 16.5 W m-1 K-1 |
| Thermal Expansion | 9.6 μm m-1 K-1 |
| Critcal Temperature | No data. |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Hardness |
|
| Brinell hardness | 265 MPa |
| Vickers hardness | 343 MPa |
Elastic Properties |
|
| Bulk modulus | 31.8 GPa |
| Poisson ratio | 0.281 |
| Shear modulus | 16.3 GPa |
| Young's modulus | 41.4 GPa |
Electrical Properties |
|
| Electrical resistivity | 6.4 x 10-7 Ω m |
| Electrical conductivity | 0.0157 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 1.7939 g Ah-1 |
| Electron Work Function | 3.2 eV |
| Valence Electron Potential (-eV) | 43.4 |
| Ionization Potential | |
| 5.53 | |
| 10.727 | |
| 22.076 | |
Energy Levels |
|
| 37.361 KeV | |
| 36.8474 KeV | |
| 42.2713 KeV | |
| 43.3204 KeV | |
| 42.1568 KeV | |
| 5.2304 KeV | |
| 5.2077 KeV | |
| 5.7216 KeV | |
| 6.0894 KeV | |
| 5.8288 KeV | |
| 5.7237 KeV | |
| 6.6021 KeV | |
| 6.8802 KeV | |
| 5.144 KeV | |
| 4.6355 KeV | |
Atomic Radii |
|
| 185 pm | |
| 206 pm | |
| No data. | |
| No data. | |
| No data. | |
| 181.4 pm | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 2 | VIII | 1.43 | 1.29 | |
| IX | 1.49 | 1.35 | ||
| 3 | VI | 1.123 | 0.983 | R |
| VIII | 1.249 | 1.109 | R* | |
| IX | 1.303 | 1.163 | R | |
| XII | 1.41 | 1.27 | E | |
| 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 |
|
| Nd+3 | |
| Nd+2, Nd+4 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 529.6 | |
| 1035 | |
| 2130 | |
| 3899 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1595 | 1774 | 1998 | (2296) | (2715) | (3336) |
Crystal Structure |
|
| Hexagonal close packed | |
![]() |
a = 365.8 pm |
| b = 365.8 pm | |
| c = 1179.9 pm | |
| α = 90° | |
| β = 90° | |
| γ = 120° | |