THULIUM

THULIUM (69) (Solid)  170(128.6 days)B-  171(1.92 years)B-
Atomic radius:2.42Deg. A (Quantum mech. value for a free atom)
Atomic volume:18.1 cm(3)/mol at 300Deg. Kelvin
Atomic weight:168.9324 (Based on Carbon 12)
Boiling point:2220Deg. Kelvin
Covalent radius:1.56Deg. A
Crystal structure:Hexagonal
Density:9.33 g/cm(3) at 300Deg. Kelvin
Electrical conductivity:.0015 10(x6) Ohm(x.1) cm(x.1) at 293Deg. Kelvin
Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(10)4s(2)p(6)4d(10)5s(2)p(6)
4f(13)6s(2)
Electronegativity:1.25 (Pauling's)
First ionization potential:6.184 V
Heat of fusion:16.84 kJ/mol at melting point
Heat of vaporization:191 kJ/mol at boiling point
Melting point:1818Deg. Kelvin
Oxidation states:3,2 basic(3)
Specific heat capacity:.16 Jg(x.1) K(x.1) at 300Deg. Kelvin
Thermal conductivity:.168 W cm(x.1( K(x.1) at 300Deg. Kelvin
Description:A trivalent metallic element of the rare-earth group.

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