Template:Infobox holmium

Holmium,  ₆₇Ho

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery white
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Holmium in the periodic table
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Atomic number (Z)	67
Group	Template:Infobox element/group
Period	period 6
Block	f-block
Element category	Template:Infobox element/category format
Electron configuration	[Xe] 4f11 6s2
Electrons per shell	2, 8, 18, 29, 8, 2
Physical properties
Phase at STP	solid
Melting point	1734 K ​(1461 °C, ​2662 °F)
Boiling point	2873 K ​(2600 °C, ​4712 °F)
Density (near r.t.)	8.79 g/cm3
when liquid (at m.p.)	8.34 g/cm3
Heat of fusion	17.0 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	251 kJ/mol
Molar heat capacity	27.15 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.23
[[Ionization energy|Template:Engvar energies]]	1st: 581.0 kJ/mol 2nd: 1140 kJ/mol 3rd: 2204 kJ/mol
Atomic radius	empirical: 176 pm
Covalent radius	192±7 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	2760 m/s (at 20 °C)
Thermal expansion	poly: 11.2 µm/(m·K) (at r.t.)
Thermal conductivity	16.2 W/(m·K)
Electrical resistivity	poly: 814 nΩ·m (at r.t.)
Magnetic ordering	paramagnetic
Young's modulus	64.8 GPa
Shear modulus	26.3 GPa
Bulk modulus	40.2 GPa
Poisson ratio	0.231
Vickers hardness	410–600 MPa
Brinell hardness	500–1250 MPa
CAS Number	7440-60-0
History
Discovery	Jacques-Louis Soret (1878)
Main isotopes of holmium
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