Samarium Element Properties

Samarium

f61
Pm
Promethium
f62
Sm
Samarium
f63
Eu
Europium
General
Name(Samarium)
Symbol(Sm)
Number(62)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(7.54 g/cm3)
Atomic Weight(150.4 g/mol)
Atomic Volume(19.95 cm3/mol)
Discover(1880)


States
State(Solid)
Melting Point(1345 K)
Boiling Point(2067 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(8.62 kJ/mol)
Heat of Vaporization(165 kJ/mol)


Energies
First Ionization Energy(543.3 kJ/mole)
Second Ionization Energy(1068 kJ/mole)
Third Ionization Energy(2260 kJ/mole)
Electronegativity(1.17)
Electron Affinity(50 kJ/mole)
Specific Heat(0.20 J/gK)
Heat Atomization(207 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,24,8,2)
Electron Configuration([Xe] 4f6 6s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


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


Reactions
Reaction with Air(vigorous, =>Sm2O3)
Reaction with 6M HCl(mild, =>H2, SmCl3)
Reaction with 15M HNO3(mild, =>Sm(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(7)
Hydride(SmH2 SmH3)
Oxide(Sm2O3)
Chloride(SmCl2 SmCl3)


Radius
Atomic Radius(180 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)(109.8 pm)


Conductivity
Thermal Conductivity(13.3 J/m-sec-deg)
Electrical Conductivity(11 1/mohm-cm)
Polarizability(28.8 A3)


Abundance
Source(Monazite(phosphate),bastnaesite)
Relation Abundance Solar System(-0.588 log)
Abundance Earths Crust(0.8 log)


f61
Pm
Promethium
f62
Sm
Samarium
f63
Eu
Europium

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