The chemist Per Theodor Cleve named holmium after the Swedish city of Stockholm. Pure holmium can produce a strong magnetic field and is therefore used in magnets. Its compounds are used to make lasers and to color glass and artificial jewelry.

Summary of properties (Ho)

Atomic weight164.930328(7)
Discoverer (year)Delafontaine, Marc & Soret, Louis (1867)
Natural formmetallic solid (hexagonal)
Electron configuration[Xe] 411 6s2
Melting point (ºC)1470
Boiling point (ºC)2720
Abundance in earth's crust (ppm)1.3
Isotope (abundance)165Ho (100)
Density g/cm38.8
Van der Waals radius (pm)230
Covalent radius (pm)179
Electronegativity (Pauling)1.23
Vaporization enthalpy (kJ/mol)251.00
Enthalpy of fusion (kJ/mol)17.00
Specific heat capacity (J/g·K) at 25ºC and 1 atm0.17
Thermal conductivity (W/cm·K) at 25ºC and 1 atm0.160
Oxidation state+3
Electron affinity (eV)
1st Ionization potential (eV)6.0215

Back to the Periodic Table of the Elements.