Electronic data
Shells: 2, 8, 18, 22, 8, 2
Orbitals: [Xe] 4f4 6s2
Electronegativity: --, 1.1
1. Ionization potential: 5.5250 eV
2. Ionization potential: 10.727 eV
3. Ionization potential: 22.076 eV
Oxidation states: 3
Electrical conductivity: 0.0157 10^6
Thermal data
Melting point: 1021 °C
Boiling point: 3074 °C
Specific heat: 0.19 J/gK
Heat of fusion: 7.140 kJ/mol
Heat of vaporization: 273.0 kJ/mol
Thermal conductivity: 0.165 W/cmK
Steric data
Atomic radius: 2.64 Å
Ionic radius: -- Å
Covalent radius: 1.64 Å
Atomic volume: 20.6 cm³/mol
Density (293 K): 7.0 g/cm³
Crystal structure: hexagonal
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