Holmium
Holmium (钬, symbol Ho) is chemical element number 67, a Lanthanide in period 6 of the periodic table, with a standard atomic weight of about 164.93. Has the highest magnetic permeability of any element. Used in surgical lasers.
Properties
| Atomic number | 67 |
|---|---|
| Symbol | Ho |
| Atomic mass | 164.93 u |
| Category | Lanthanide |
| Period | 6 |
| Group | — |
| Electron configuration | [Xe] 4f¹¹ 6s² |
| Electronegativity | 1.23 |
| Covalent radius | 192 pm |
| Density | 8.795 g/cm³ |
| Melting point | 1734 K |
| Boiling point | 2993 K |
| Discovery | Soret, Delafontaine & Cleve, 1878 |
Overview
Has the highest magnetic permeability of any element. Used in surgical lasers. Holmium (Ho) holds position 67 in the periodic table, a Lanthanide in period 6. As a lanthanide (rare-earth) element it closely resembles its neighbours and serves in magnets, phosphors and catalysts.
With 2 electrons in its outermost shell, Holmium bonds accordingly; full configuration [Xe] 4f¹¹ 6s², electronegativity 1.23. At room temperature it is normally a solid; it melts near 1734 K (1460.9 °C), boils near 2993 K (2719.9 °C), has a density around 8.795 g/cm³.
Common applications range across Research and Electronics / Semiconductors. It was first described by Soret, Delafontaine & Cleve in 1878. See more trends in the visualization center.
Electron shells
Electrons per shell: 2 · 8 · 18 · 29 · 8 · 2
Main uses
- Research
- Electronics / Semiconductors
Hazard
Compounds containing Holmium
No compounds in this knowledge base contain Holmium yet.
Data sources
Atomic mass uses IUPAC (CIAAW) standard atomic weights; the covalent radius is from Cordero et al. (2008). Verify on the RSC Periodic Table, PubChem and Wikipedia. Educational reference only.