Holmium Element Properties

Holmium

f66
Dy
Dysprosium
f67
Ho
Holmium
f68
Er
Erbium
General
Name(Holmium)
Symbol(Ho)
Number(67)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(8.80 g/cm3)
Atomic Weight(164.9304 g/mol)
Atomic Volume(18.7 cm3/mol)
Discover(1879)


States
State(Solid)
Melting Point(1734 K)
Boiling Point(2993 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(17.0 kJ/mol)
Heat of Vaporization(265 kJ/mol)


Energies
First Ionization Energy(580.7 kJ/mole)
Second Ionization Energy(1139 kJ/mole)
Third Ionization Energy(2204 kJ/mole)
Electronegativity(1.23)
Electron Affinity(50 kJ/mole)
Specific Heat(0.16 J/gK)
Heat Atomization(301 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,29,8,2)
Electron Configuration([Xe] 4f11 6s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(hexagonal)
Characteristics(None)
Color(silvery-white)
Uses(alloys)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>Ho2O3)
Reaction with 6M HCl(mild, =>H2, HoCl3)
Reaction with 15M HNO3(mild, =>Ho(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(HoH2 HoH3)
Oxide(Ho2O3)
Chloride(HoCl3)


Radius
Atomic Radius(176 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(104.1 pm)


Conductivity
Thermal Conductivity(16.2 J/m-sec-deg)
Electrical Conductivity(11.4 1/mohm-cm)
Polarizability(23.6 A3)


Abundance
Source(Monazite(phosphate),bastnaesite)
Relation Abundance Solar System(-1.051 log)
Abundance Earths Crust(0.1 log)


f66
Dy
Dysprosium
f67
Ho
Holmium
f68
Er
Erbium

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