ChemGlobe

Holmium

Metalsolid
Symbol: Ho
Atomic number: 67
Atomic mass: 164.93032
Group: Lanthanide
CAS-number: 7440-60-0

Deutsch
Français
Español
Physical data
Isotopes
Other info
Navigation
disabled arrow
Dy Dysprosium To Periodic Table ErbiumEr
Einsteinium
Es

Go to element

Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 29, 8, 2
Orbitals: [Xe] 4f11 6s2
Electronegativity: --, 1.1
1. Ionization potential: 6.0216 eV
2. Ionization potential: 11.805 eV
3. Ionization potential: 22.843 eV
Oxidation states: 3
Electrical conductivity: 0.0124 10^6
Melting point: 1474 °C
Boiling point: 2700 °C
Specific heat: 0.16 J/gK
Heat of fusion: 12.20 kJ/mol
Heat of vaporization: 241.0 kJ/mol
Thermal conductivity: 0.162 W/cmK
Atomic radius: 2.47 Å
Ionic radius: -- Å
Covalent radius: 1.58 Å
Atomic volume: 18.7 cm³/mol
Density (293 K): 8.80 g/cm³
Crystal structure: hexagonal
hexagonal

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
163Ho 0 163 7/2 4.57E03y EC View
165Ho 100 164.93 7/2 -- --
166Ho 0 166 0 1.117d β- View
166Hom 0 166 7 1.2E03y β- View

Other info

Name origin:From Holmia, the Latinized name for Stockholm, Sweden.
Description:Fairly soft, malleable, lustrous, silvery metal.
Discovered by:J.L. Soret
Year:1878
Place:Switzerland
Sources:Occurs in gadolinite. Most often from monazite which is often 50% rare earth and typically 0.05% holmium.
Use(s):It has very few practical applications; however, it has some unusual magnetic properties that offer some hope for future applications.