65
Tb
Terbium
158.925352
28182782
#65
Terbium
lanthanide· Solid·158.925352 u
Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.
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Identity
- Symbol
- Tb
- Atomic Number
- 65
- Atomic Mass
- 158.925352 u
- Category
- lanthanide
- Block
- f-block
- Period
- 6
- Group
- 3
- Appearance
- silvery white
- Year Discovered
- 1843 CE
- Discovered By
- Carl Gustaf Mosander
- Named By
- Ytterby mine
Electrons
- Configuration
- [Xe] 4f9 6s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f9
- Shells
- 2, 8, 18, 27, 8, 2
- Electronegativity
- 1.1
- Electron Affinity
- 112.4
- Oxidation States
- +3
- Ionization Energies
- 565.8, 1110, 2114, 3839
Physical Properties
- State at
- Solid
- Melting Point
- 1629
- Boiling Point
- 3396
- Density
- 8.23
- Molar Heat
- 28.91 J/(mol·K)
- Crystal Structure
- HEX
- Magnetic Ordering
- Paramagnetic
Mechanical
- Covalent Radius
- 194 pm
- Metallic Radius
- 177 pm
- Mohs Hardness
- 2
- Bulk Modulus
- 38.7 GPa GPa
- Shear Modulus
- 22.1 GPa GPa
- Young's Modulus
- 55.7 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 11.1 W/(m K) W/(m·K)
- Electrical Conductivity
- 0.889 MS/m S/m
- Specific Heat
- 182 J/(kg K) J/(g·K)
- Heat of Vaporization
- 293 kJ/mol kJ/mol
- Heat of Fusion
- 10.8 kJ/mol kJ/mol
Abundance
- Universe
- 50.0 ppt
- Sun
- 0.1 ppb
- Meteorite
- 36.0 ppb
- Earth's Crust
- 1.2 ppm
- Ocean
- 1.4e-7 ppm
- Human Body
- 0