Holmium

(So named (Modern Latin Holmia, Stockholm) by P. T. Cleve, Swedish chemist, its second discoverer, after his native city) A trivalent, silvery chemical element, one of the rare-earth metals.

Symbol: Ho
Atomic number: 67
Atomic weight: 164.93032
Density (at room temperature and pressure): 8.80 g/cc
Melting point: 1,474°C
Boiling point: 2,700°C
Valence: +3
Ground state electron configuration: [Xe]4f¹¹6s²

Holmium
Symbol: Ho
Atomic Number: 67
Atomic Weight: 164.9303
Boiling Point: 2968 K
Melting Point: 1747 K
Density at 300K: 8.80 g/cm³
Covalent radius: 1.58
Atomic radius: 2.47
Atomic volume: 18.7 cm³/mol
First ionization potental: 6.02 V
Specific heat capacity: 0.165 Jg^-1K^-1
Thermal conductivity: 16.2 Wm^-1K^-1
Electrical conductivity: 1.1*10⁶Ω^-1m^-1
Heat of fusion: 17.15 kJ/mol
Heat of vaporization: 251.04 kJ/mol
Electronegativity: 1.23 (Pauling's)

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Hol"mi*um (?), n. [NL., of uncertain origin.] Chem.

A rare element said to be contained in gadolinite.

-- Hol"mic (#), a.

 

© Webster 1913.