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|
Lutetium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Lu | 71 | 174.967 | 1652 °C | 3402 °C | Solid | 9.841 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
lutetium, Lu, 71 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, d |
| Appearance |
silvery white
 |
| Standard atomic weight |
174.967(1) g·mol−1 |
| Electron configuration |
Xe 6s2 4f14 5d1 |
| Electrons per shell |
2, 8, 18, 32, 9, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
9.841 g·cm−3 |
| Liquid density at m.p. |
9.3 g·cm−3 |
| Melting point |
1925 K
(1652 °C, 3006 °F) |
| Boiling point |
3675 K
(3402 °C, 6156 °F) |
| Heat of fusion |
ca. 22 kJ·mol−1 |
| Heat of vaporization |
414 kJ·mol−1 |
| Heat capacity |
(25 °C) 26.86 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
1906 |
2103 |
2346 |
(2653) |
(3072) |
(3663) |
|
| Atomic properties |
| Crystal structure |
hexagonal |
| Oxidation states |
3
(weakly basic oxide) |
| Electronegativity |
1.27 (scale Pauling) |
Ionization energies
(more) |
1st: 523.5 kJ·mol−1 |
| 2nd: 1340 kJ·mol−1 |
| 3rd: 2022.3 kJ·mol−1 |
| Atomic radius |
175 pm |
| Atomic radius (calc.) |
217 pm |
| Covalent radius |
160 pm |
| Miscellaneous |
| Magnetic ordering |
no data |
| Electrical resistivity |
(r.t.) (poly) 582 nΩ·m |
| Thermal conductivity |
(300 K) 16.4 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (poly) 9.9 µm/(m·K) |
| Young's modulus |
68.6 GPa |
| Shear modulus |
27.2 GPa |
| Bulk modulus |
47.6 GPa |
| Poisson ratio |
0.261 |
| Vickers hardness |
1160 MPa |
| Brinell hardness |
893 MPa |
| CAS registry number |
7439-94-3 |
| Selected isotopes |
|
|
| References |
|
Lutetium Compounds
|
Source: Wikipedia article Lutetium
|
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Chemistry Quick Facts
