Terbium Facts - Tb Facts

Terbium Facts - Tb Facts Get Tb facts or terbium facts and figures. Learn about the properties of this important element: TerbiumBasic Facts Atomic Number: 65 Symbol: Tb Atomic Weight: 158.92534 Discovery: Carl Mosander 1843 (Sweden) Electron Configuration: [Xe] 4f9 6s2 Element Classification: Rare Earth (Lanthanide) Word Origin: Named after Ytterby, a village in Sweden. Terbium Physical Data Density (g/cc): 8.229 Melting Point (K): 1629 Boiling Point (K): 3296 Appearance: soft, ductile, silvery-gray, rare-earth metal Atomic Radius (pm): 180 Atomic Volume (cc/mol): 19.2 Covalent Radius (pm): 159 Ionic Radius: 84 (4e) 92.3 (3e) Specific Heat (20Â °C J/g mol): 0.183 Evaporation Heat (kJ/mol): 389 Pauling Negativity Number: 1.2 First Ionizing Energy (kJ/mol): 569 Oxidation States: 4, 3 Lattice Structure: Hexagonal Lattice Constant (Ã…): 3.600 Lattice C/A Ratio: 1.581 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (18th Ed.) Return to the Periodic Table