Electronic data
Shells: 2, 8, 18, 32, 13, 2
Orbitals: [Xe] 4f14 5d5 6s2
Electronegativity: 1.9, 1.5
1. Ionization potential: 7.88 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 7, 6, 4, 2, -1
Electrical conductivity: 0.0542 10^6
Thermal data
Melting point: 3180 °C
Boiling point: 5627 °C (estimated)
Specific heat: 0.13 J/gK
Heat of fusion: 33.20 kJ/mol
Heat of vaporization: 715.0 kJ/mol
Thermal conductivity: 0.479 W/cmK
Steric data
Atomic radius: 1.97 Å
Ionic radius: 0.53 Å (+7)
Covalent radius: 1.28 Å
Atomic volume: 8.85 cm³/mol
Density (293 K): 21.0 g/cm³
Crystal structure: hexagonal
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