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|
Dysprosium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Dy | 66 | 162.500 | 1407 °C | 2567 °C | Solid | 8.540 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
dysprosium, Dy, 66 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, f |
| Appearance |
silvery white
 |
| Standard atomic weight |
162.500(1) g·mol−1 |
| Electron configuration |
[Xe] 4f10 6s2 |
| Electrons per shell |
2, 8, 18, 28, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
8.540 g·cm−3 |
| Liquid density at m.p. |
8.37 g·cm−3 |
| Melting point |
1680 K
(1407 °C, 2565 °F) |
| Boiling point |
2840 K
(2562 °C, 4653 °F) |
| Heat of fusion |
11.06 kJ·mol−1 |
| Heat of vaporization |
280 kJ·mol−1 |
| Heat capacity |
(25 °C) 27.7 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
1378 |
1523 |
(1704) |
(1954) |
(2304) |
(2831) |
|
| Atomic properties |
| Crystal structure |
hexagonal |
| Oxidation states |
3
(weakly basic oxide) |
| Electronegativity |
1.22 (scale Pauling) |
Ionization energies
(more) |
1st: 573.0 kJ·mol−1 |
| 2nd: 1130 kJ·mol−1 |
| 3rd: 2200 kJ·mol−1 |
| Atomic radius |
175 pm |
| Atomic radius (calc.) |
228 pm |
| Miscellaneous |
| Magnetic ordering |
paramagnetic at r.t.,
ferromagnetic under
liquid nitrogen |
| Electrical resistivity |
(r.t.) (α, poly) 926 nΩ·m |
| Thermal conductivity |
(300 K) 10.7 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (α, poly)
9.9 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 2710 m/s |
| Young's modulus |
(α form) 61.4 GPa |
| Shear modulus |
(α form) 24.7 GPa |
| Bulk modulus |
(α form) 40.5 GPa |
| Poisson ratio |
(α form) 0.247 |
| Vickers hardness |
540 MPa |
| Brinell hardness |
500 MPa |
| CAS registry number |
7429-91-6 |
| Selected isotopes |
|
|
| References |
|
Dysprosium Compounds
|
Source: Wikipedia article Dysprosium
|
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Chemistry Quick Facts
