Lutetium
| Latin name | Lutecium |
| English name | Lutetium |
| chemical symbol | Lu |
| atomic number | 71 |
| relative atomic mass | 174,967 |
| period | 6 |
| group | III.B |
| classification | lanthanides |
| discovery year | 1907 |
| discoverer | Welsbach, James, Urbain |
| melting point [°C] | 1663 |
| boiling point [°C] | 3402 |
| density [g cm-3] | 9,85 |
| density at melting point [g cm-3] | 9,3 |
| electronegativity [Pauling] | 1,27 |
| oxidation states | III |
| electron configuration | [Xe]4f14 5d1 6s2 |
| atomic radius [pm] | 217 |
| covalent radius [pm] | 160 |
| specific heat [J g-1K-1] | 0,15 |
| heat of fusion [kJ mol-1] | 18,6 |
| thermal conductivity [W m-1 K-1] | 16 |
| el. conductivity [S m-1] | 1,8.106 |
| 1. ionizing potential [eV] | 5,4259 |
| 2. ionizing potential [eV] | 13,888 |
| 3. ionizing potential [eV] | 20,957 |
| Vickers hardness [MPa] | 1160 |
| Brinell hardness [MPa] | 893 |
| shear modulus [GPa] | 27 |
| Young's modulus [GPa] | 69 |
| state at normal conditions | solid |
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