Erbium
| Latin name | Erbium |
| English name | Erbium |
| chemical smybol | Er |
| atomic number | 68 |
| relative atomic mass | 167,26 |
| period | 6 |
| group | III.B |
| classification | lanthanides |
| discovery year | 1843 |
| discoverer | Carl Mosander |
| melting point [°C] | 1529 |
| boiling point [°C] | 2868 |
| density [g cm-3] | 9,05 |
| density at melting point [g cm-3] | 8,86 |
| electronegativity [Pauling] | 1,24 |
| oxidation states | III |
| electron configuration | [Xe]4f12 6s2 |
| atomic radius [pm] | 226 |
| specific heat [J g-1K-1] | 0,17 |
| heat of fusion [kJ mol-1] | 19,9 |
| thermal conductivity [W m-1 K-1] | 15 |
| el. conductivity [S m-1] | 1,2.106 |
| 1. ionizing potential [eV] | 6,1078 |
| 2. ionizing potential [eV] | 11,929 |
| 3. ionizing potential [eV] | 22,739 |
| Vickers hardness [MPa] | 589 |
| Brinell hardness [MPa] | 814 |
| shear modulus [GPa] | 28 |
| Young's modulus [GPa] | 70 |
| Curie point [K] | 32 |
| state at normal conditions | solid |
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