Electronic data		Thermal data		Steric 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

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
163Ho	0	163	7/2	4.57E03y	EC	View
165Ho	100	164.93	7/2	--	stable	--
166Ho	0	166	0	1.117d	-	View
166Hom	0	166	7	1.2E03y	-	View

Legend

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.