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|
Europium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Eu | 63 | 151.964 | 826 °C | 1529 °C | Solid | 5.244 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
europium, Eu, 63 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, f |
| Appearance |
silvery white
 |
| Standard atomic weight |
151.964(1) g·mol−1 |
| Electron configuration |
[Xe] 4f7 6s2 |
| Electrons per shell |
2, 8, 18, 25, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
5.264 g·cm−3 |
| Liquid density at m.p. |
5.13 g·cm−3 |
| Melting point |
1099 K
(826 °C, 1519 °F) |
| Boiling point |
1802 K
(1529 °C, 2784 °F) |
| Heat of fusion |
9.21 kJ·mol−1 |
| Heat of vaporization |
176 kJ·mol−1 |
| Heat capacity |
(25 °C) 27.66 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
863 |
957 |
1072 |
1234 |
1452 |
1796 |
|
| Atomic properties |
| Crystal structure |
simple cubic (body centered) |
| Oxidation states |
3,2
(mildly basic oxide) |
| Electronegativity |
? 1.2 (scale Pauling) |
Ionization energies
(more) |
1st: 547.1 kJ·mol−1 |
| 2nd: 1085 kJ·mol−1 |
| 3rd: 2404 kJ·mol−1 |
| Atomic radius |
185 pm |
| Atomic radius (calc.) |
231 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(r.t.) (poly) 0.900 µΩ·m |
| Thermal conductivity |
(300 K) est. 13.9 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (poly)
35.0 µm/(m·K) |
| Young's modulus |
18.2 GPa |
| Shear modulus |
7.9 GPa |
| Bulk modulus |
8.3 GPa |
| Poisson ratio |
0.152 |
| Vickers hardness |
167 MPa |
| CAS registry number |
7440-53-1 |
| Selected isotopes |
|
|
| References |
|
Europium Compounds
|
Source: Wikipedia article Europium
|
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Chemistry Quick Facts
