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|
Ytterbium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Yb | 70 | 173.04 | 824 °C | 1196 °C | Solid | 6.90 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
ytterbium, Yb, 70 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, f |
| Appearance |
silvery white
 |
| Standard atomic weight |
173.04(3) g·mol−1 |
| Electron configuration |
[Xe] 4f14 6s2 |
| Electrons per shell |
2, 8, 18, 32, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
6.90 g·cm−3 |
| Liquid density at m.p. |
6.21 g·cm−3 |
| Melting point |
1097 K
(824 °C, 1515 °F) |
| Boiling point |
1469 K
(1196 °C, 2185 °F) |
| Heat of fusion |
7.66 kJ·mol−1 |
| Heat of vaporization |
159 kJ·mol−1 |
| Heat capacity |
(25 °C) 26.74 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
736 |
813 |
910 |
1047 |
(1266) |
(1465) |
|
| Atomic properties |
| Crystal structure |
cubic face centered |
| Oxidation states |
2,3
(basic oxide) |
| Electronegativity |
? 1.1 (scale Pauling) |
Ionization energies
(more) |
1st: 603.4 kJ·mol−1 |
| 2nd: 1174.8 kJ·mol−1 |
| 3rd: 2417 kJ·mol−1 |
| Atomic radius |
175 pm |
| Atomic radius (calc.) |
222 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(r.t.) (β, poly)
0.250 µΩ·m |
| Thermal conductivity |
(300 K) 38.5 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (β, poly)
26.3 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 1590 m/s |
| Young's modulus |
(β form) 23.9 GPa |
| Shear modulus |
(β form) 9.9 GPa |
| Bulk modulus |
(β form) 30.5 GPa |
| Poisson ratio |
(β form) 0.207 |
| Vickers hardness |
206 MPa |
| Brinell hardness |
343 MPa |
| CAS registry number |
7440-64-4 |
| Selected isotopes |
|
|
| References |
|
Ytterbium Compounds
|
Source: Wikipedia article Ytterbium
|
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Chemistry Quick Facts
