Terbium
Terbium General
Name:Terbium | Symbol:Tb |
Type:Rare Earth, Lanthanides | Atomic weight:158.9254 |
Density @ 293 K:8.27 g/cm3 | Atomic volume:19.2 cm3/mol |
Discovered:
1843 |
Terbium States
State (s, l, g):solid | |
Melting point: 1633.2 K | Boiling point:3073 K |
Terbium Energies
Specific heat capacity:0.18 J/gK | Heat of atomization:389 kJ/mole atoms |
Heat of fusion:10.80 kJ/mol | Heat of vaporization :330.90 kJ/mol |
1st ionization energy: 564.7 kJ/mole | 2nd ionization energy:1112 kJ/mole |
3rd ionization energy:2114 kJ/mole | Electron affinity:50 kJ/mole |
Terbium Oxidation & Electrons
Shells:2,8,18,27,8,2 | Electron configuration:[Xe] 4f9 6s2 |
Minimum oxidation number:0 | Maximum oxidation number:4 |
Min. common oxidation no.:0 | Max. common oxidation no.:3 |
Electronegativity (Pauling Scale):1.21 | Polarizability volume:25.5 Å3 |
Terbium Appearance & Characteristics
Structure:hcp: hexagonal close pkd | Color:silvery-white |
Hardness:mohs | |
Harmful effects:
|
|
Characteristics:
soft Uses: alloys |
Terbium Reactions
Reaction with air:vigorous, => Tb4 O7 (approx.) | Reaction with 6 M HCl:mild, => H2, TbCl3 |
Reaction with 15 M HNO3:mild, => Tb(NO3 )3 | Reaction with 6 M NaOH: |
Terbium Compounds
Oxide(s):TbO2 Tb4 O7 | Chloride(s): TbCl3 |
Hydride(s):TbH2 TbH3 |
Terbium Radius
Atomic radius: 177 pm | Ionic radius (1+ ion):pm |
Ionic radius (2+ ion):pm | Ionic radius (3+ ion):106.3 pm |
Ionic radius (2- ion):pm | Ionic radius (1- ion):pm |
Terbium Conductivity
Thermal conductivity:11.1 J/m-sec-deg | Electrical conductivity:8.8 1/mohm-cm |
Terbium Abundance & Isotopes
Abundance earth's crust:0 log | |
Abundance solar system:-1.220 log | |
Cost, pure:$5040 per 100g | |
Cost, bulk: $ per 100g | |
Source:
Monazite(phosphate),bastnaesite |
|
Isotopes:
1 |
Terbium Other
Other:
|
Prev: Gadolinium Next: Dysprosium |