|
|
| Dysprosium | |
| Electron Configuration | 2,8,18,28,8,2 |
| Electron Configuration | [Xe] 4f10 6s2 |
| Ground state | 5I8 |
| Atomic Volume | 19 g/cm3 |
| Electronegativity | 1.22 |
| Magnetic ordering | Nonmagnetic at r.t., ferromagnetic under liquid nitrogen |
| Mass magnetic susceptibility | 5.45 x 10-6 |
| Molar magnetic susceptibility | 8.85625 x 10-7 |
| Speed of sound | 2710 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 | 293 kJ mol-1 |
| Heat Capacity | 27.7 J mol-1 K-1 |
| Thermal Conductivity | 10.7 W m-1 K-1 |
| Thermal Expansion | 9.9 μm m-1 K-1 |
| Hardness |
|
| Brinell hardness | 500 MPa |
| Vickers hardness | 540 MPa |
| Elastic Properties |
|
| Bulk modulus | 40.5 GPa |
| Poisson ratio | 0.247 |
| Shear modulus | 24.7 GPa |
| Young's modulus | 61.4 GPa |
| Electrical Properties |
|
| Electrical resistivity | 9.1 x 10-7 Ω m |
| Electrical conductivity | No data. |
| Chemical Properties |
|
| Electrochemical Equivalent | 2.021 g Ah-1 |
| Valence Electron Potential (-eV) | 47.4 |
| Ionization Potential | |
 First
|
5.94 |
| Second
|
11.67 |
| Third
|
22.802 |
| Energy Levels |
|
| Kα1 (intensity 100) |
45.9984 KeV |
| Kα2 (intensity 50) |
45.2078 KeV |
| Kβ1 (intensity 23.5) |
52.119 KeV |
| Kβ2 (intensity 8.5) |
53.3536 KeV |
| Kβ3 (intensity 9.5) |
51.9565 KeV |
| Lα1 (intensity 100) |
6.4952 KeV |
| Lα2 (intensity 10) |
6.4577 KeV |
| Lβ1 (intensity 42) |
7.2477 KeV |
| Lβ2 (intensity 17) |
7.6357 KeV |
| Lβ3 (intensity 10) |
7.3699 KeV |
| Lβ4 (intensity 7) |
7.2023 KeV |
| Lγ1 (intensity 5.8) |
8.4188 KeV |
| Lγ2 (intensity 2) |
8.7153 KeV |
| Lγ3 (intensity 2) |
6.532 KeV |
| Ll (intensity 4.5) |
5.7445 KeV |
| Atomic Radii |
|
| Empirical
|
175 pm |
| Bohr Radius
|
228 pm |
| Covalent Radius
|
No data. |
| Van der Waals
|
No data. |
| Triple covalent
|
No data. |
| Metallic
|
178.1 pm |
| Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 2 | VI | 1.21 | 1.07 | |
| VII | 1.27 | 1.13 | ||
| VIII | 1.33 | 1.19 | ||
| 3 | VI | 1.052 | 0.912 | R |
| VII | 1.11 | 0.97 | ||
| VIII | 1.167 | 1.027 | R | |
| IX | 1.223 | 1.083 | R | |
| 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 |
|
| Main
|
Dy+3 |
| Other
|
Dy+2, Dy+4 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
571.9 |
| M+ - M2+ |
1126 |
| M2+ - M3+ |
2200 |
| M3+ - M4+ |
4001 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 1378 | 1523 | (1704) | (1954) | (2304) | (2831) |
| Crystal Structure |
|
| Structure
|
Hexagonal close packed |
 |
a = 359.3 pm |
| b = 359.3 pm | |
| c = 565.37 pm | |
| α = 90° | |
| β = 90° | |
| γ = 120° | |