Overview |
Name | Terbium |
Symbol | Tb |
Atomic Number | 65 |
Atomic Weight | 158.92534 |
Density | 8.219 g/cm3 |
Melting Point | 1356 °C |
Boiling Point | 3230 °C |
Thermal properties |
Phase | Solid |
Melting Point | 1356 °C |
Boiling Point | 3230 °C |
Absolute Melting Point | 1629 K |
Absolute Boiling Point | 3503 K |
Heat of Fusion | 10.8 kJ/mol |
Heat of Vaporization | 295 kJ/mol |
Heat of Combustion | N/A |
Specific Heat | 182 J/(kg K)[note] |
Thermal Conductivity | 11 W/(m K) |
Thermal Expansion | 0.0000103 K-1 |
Bulk physical properties |
Density | 8.219 g/cm3 |
Density (Liquid) | 7.65 g/cm3 |
Molar Volume | 0.000019336 |
Brinell Hardness | 677 MPa |
Vickers Hardness | 863 MPa |
Bulk Modulus | 38.7 GPa |
Shear Modulus | 22 GPa |
Young Modulus | 56 GPa |
Poisson Ratio | 0.26 |
Speed of Sound | 2620 m/s |
Thermal Conductivity | 11 W/(m K) |
Thermal Expansion | 0.0000103 K-1 |
Reactivity |
Valence | 3 |
Electronegativity | N/A |
ElectronAffinity | 50 kJ/mol |
Ionization Energies | 565.8, 1110, 2114, 3839 kJ/mol |
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Health and Safety |
Autoignition Point | N/A |
Flashpoint | N/A |
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Classifications |
Alternate Names | None |
Nams of Allotropes | None |
Block | f |
Group | N/A |
Period | 6 |
Electron Configuration | [Xe]4f96s2 |
Color | Silver |
Discovery | |
Gas phase | N/A |
CAS Number | CAS7440-27-9 |
Electrical properties |
Electrical Type | Conductor |
Electrical Conductivity | 8.3×105 S/m |
Resistivity | 1.2×10-6 m Ω |
Superconducting Point | N/A |
Magnetic properties |
Magnetic Type | Paramagnetic |
Curie Point | 222 K |
Mass Magnetic Susceptibility | 0.0000136 |
Molar Magnetic Susceptibility | 2.161385×10-6 |
Volume Magnetic Susceptibility | 0.1117784 |
Abundances |
% in Universe | 5×10-8% |
% in Sun | 1×10-8% |
% in Meteorites | 3.9×10-6% |
% in Earth's Crust | 0.000093% |
% in Oceans | 1.4×10-11% |
% in Humans | N/A |
Atomic dimensions and structure |
Atomic Radius | 225 pm |
Covalent Radius | N/A |
Van der Waals Radius | N/A |
Crystal Structure | Simple Hexagonal |
Lattice Angles | |
Lattice Constants | |
Space Group Name | P63/mmc |
Space Group Number | 194 |
Nuclear Properties |
Half-Life | Stable |
Lifetime | Stable |
Stable Isotopes | |
Isotopic Abundances | |
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