Holmium
| Latin name | Holmium |
| English name | Holmium |
| chemical symbol | Ho |
| atomic number | 67 |
| relative atomic mass | 164,93032 |
| period | 6 |
| group | III.B |
| classification | lanthanides |
| discovery year | 1878 |
| discoverer | Delafontaine, Soret |
| melting point [°C] | 1474 |
| boiling point [°C] | 2700 |
| density [g cm-3] | 8,78 |
| density at melting point [g cm-3] | 8,34 |
| electronegativity [Pauling] | 1,23 |
| oxidation states | III |
| electron configuration | [Xe]4f11 6s2 |
| atomic radius [pm] | 175 |
| covalent radius [pm] | 192 |
| specific heat [J g-1K-1] | 0,16 |
| heat of fusion [kJ mol-1] | 12,2 |
| thermal conductivity [W m-1 K-1] | 16,2 |
| el. conductivity [S m-1] | 1,1.106 |
| 1. ionizing potential [eV] | 6,0216 |
| 2. ionizing potential [eV] | 11,805 |
| 3. ionizing potential [eV] | 22,843 |
| Vickers hardness [MPa] | 481 |
| Brinell hardness [MPa] | 746 |
| shear modulus [GPa] | 26 |
| Young's modulus [GPa] | 65 |
| Curie point [K] | 20 |
| state at normal conditions | solid |
Holmium is a soft and malleable metal.
Resources
- EMSLEY, John. The Elements. Oxford: Clarendon Press, 1998. ISBN 9780198558187.
- Holmium. In: American Elements [online]. 2009 [cit. 2012-12-15]. Available from: http://www.americanelements.com/
- Holmium. In: Radiochemistry Society [online]. 2003 [cit. 2012-12-23]. Available from: http://www.radiochemistry.org/
- STWERTKA, Albert. A Guide to the Elements. Oxford: University Press, 2002. ISBN 0-19-515027-9.
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