Terbium Element Properties

Terbium

f64
Gd
Gadolinium
f65
Tb
Terbium
f66
Dy
Dysprosium
General
Name(Terbium)
Symbol(Tb)
Number(65)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(8.27 g/cm3)
Atomic Weight(158.9254 g/mol)
Atomic Volume(19.2 cm3/mol)
Discover(1843)


States
State(Solid)
Melting Point(1629 K)
Boiling Point(3503 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(10.15 kJ/mol)
Heat of Vaporization(293 kJ/mol)


Energies
First Ionization Energy(564.7 kJ/mole)
Second Ionization Energy(1112 kJ/mole)
Third Ionization Energy(2114 kJ/mole)
Electronegativity(1.21)
Electron Affinity(50 kJ/mole)
Specific Heat(0.18 J/gK)
Heat Atomization(389 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,27,8,2)
Electron Configuration([Xe] 4f9 6s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(4)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


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


Reactions
Reaction with Air(vigorous, =>Tb4O7 (approx.))
Reaction with 6M HCl(mild, =>H2, TbCl3)
Reaction with 15M HNO3(mild, =>Tb(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(TbH2 TbH3)
Oxide(TbO2 Tb4O7)
Chloride(TbCl3)


Radius
Atomic Radius(177 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)(106.3 pm)


Conductivity
Thermal Conductivity(11.1 J/m-sec-deg)
Electrical Conductivity(8.8 1/mohm-cm)
Polarizability(25.5 A3)


Abundance
Source(Monazite(phosphate),bastnaesite)
Relation Abundance Solar System(-1.220 log)
Abundance Earths Crust(0 log)


f64
Gd
Gadolinium
f65
Tb
Terbium
f66
Dy
Dysprosium

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