Erbium Element Properties

Erbium

f67
Ho
Holmium
f68
Er
Erbium
f69
Tm
Thulium
General
Name(Erbium)
Symbol(Er)
Number(68)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(9.05 g/cm3)
Atomic Weight(167.26 g/mol)
Atomic Volume(18.4 cm3/mol)
Discover(1843)


States
State(Solid)
Melting Point(1802 K)
Boiling Point(3141 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(19.90 kJ/mol)
Heat of Vaporization(280 kJ/mol)


Energies
First Ionization Energy(588.7 kJ/mole)
Second Ionization Energy(1151 kJ/mole)
Third Ionization Energy(2194 kJ/mole)
Electronegativity(1.24)
Electron Affinity(50 kJ/mole)
Specific Heat(0.17 J/gK)
Heat Atomization(317 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,30,8,2)
Electron Configuration([Xe] 4f12 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, photogr. filter)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>Er2O3)
Reaction with 6M HCl(mild, =>H2, ErCl3)
Reaction with 15M HNO3(mild, =>Er(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(6)
Hydride(ErH2 ErH3)
Oxide(Er2O3)
Chloride(ErCl3)


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)(103 pm)


Conductivity
Thermal Conductivity(14.5 J/m-sec-deg)
Electrical Conductivity(14.1 1/mohm-cm)
Polarizability(22.7 A3)


Abundance
Source(Monazite(phosphate),bastnaesite)
Relation Abundance Solar System(-0.601 log)
Abundance Earths Crust(0.4 log)


f67
Ho
Holmium
f68
Er
Erbium
f69
Tm
Thulium

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