Europium Element Properties

Europium

f62
Sm
Samarium
f63
Eu
Europium
f64
Gd
Gadolinium
General
Name(Europium)
Symbol(Eu)
Number(63)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(5.259 g/cm3)
Atomic Weight(151.96 g/mol)
Atomic Volume(28.9 cm3/mol)
Discover(1901)


States
State(Solid)
Melting Point(1099 K)
Boiling Point(1802 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(9.21 kJ/mol)
Heat of Vaporization(176 kJ/mol)


Energies
First Ionization Energy(546.7 kJ/mole)
Second Ionization Energy(1085 kJ/mole)
Third Ionization Energy(2405 kJ/mole)
Electronegativity(1.12)
Electron Affinity(50 kJ/mole)
Specific Heat(0.18 J/gK)
Heat Atomization(178 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,25,8,2)
Electron Configuration([Xe] 4f7 6s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(simple cubic (body centered))
Characteristics(hard)
Color(silvery-white)
Uses(alloys, color TV phosphor)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>Eu2O3)
Reaction with 6M HCl(mild, =>H2, EuCl3)
Reaction with 15M HNO3(mild, =>Eu(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(2)
Hydride(EuH2)
Oxide(Eu2O3)
Chloride(EuCl2 EuCl3)


Radius
Atomic Radius(208 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(131 pm)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(108.7 pm)


Conductivity
Thermal Conductivity(13.9 J/m-sec-deg)
Electrical Conductivity(11 1/mohm-cm)
Polarizability(27.7 A3)


Abundance
Source(Monazite(phosphate),bastnaesite)
Relation Abundance Solar System(-1.012 log)
Abundance Earths Crust(0.1 log)


f62
Sm
Samarium
f63
Eu
Europium
f64
Gd
Gadolinium

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