Ytterbium
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
| Ytterbium |
|
70Yb
|
|
|
| Ìhànsójú |
silvery white
 |
| Àwọn ìdámọ́ wíwọ́pọ̀ |
| Orúkọ, àmì-ìdámọ́, nọ́mbà |
ytterbium, Yb, 70 |
| Ẹ̀ka ẹ́límẹ̀nti |
lanthanide |
| Ẹgbẹ́, àsìkò, àdìpò |
n/a, 6, f |
| Ìwúwo átọ́mù |
173.04 |
| Ìtòléra ẹ̀lẹ́ktrónì |
[Xe] 4f14 6s2
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 |
| Molar heat capacity |
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 |
| Oxidation states |
3, 2 (basic oxide) |
| Electronegativity |
? 1.1 (Pauling scale) |
| Ionization energies |
1st: 603.4 kJ·mol−1 |
| 2nd: 1174.8 kJ·mol−1 |
| 3rd: 2417 kJ·mol−1 |
| Atomic radius |
176 pm |
| Covalent radius |
187±8 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic
|
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(r.t.) (β, poly) 0.250 µΩ·m |
| Thermal conductivity |
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−1 |
| 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 |
| Àwọn ísótòpù dídúró jùlọ |
| Main article: Àwọn ísótòpù ytterbium |
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· r |
