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The least abundant of the rare earth elements, thulium occurs in small quantities along with other rare earths in many minerals. It is silvery-gray, soft, malleable, ductile, and can be cut with a knife. The pure metal is bright and lustrous and reasonable stable in air.
|Property Name||Property Value||Property Name||Property Value|
|CAS #||7440-30-4||Covalent Radius||1.56Angstroms|
|Electrical Resistivity @ 298°C||67.6µΩ-cm|
|Melting Point||1545°C||Crystal Structure||Hexagonal|
|Density||9.32g/cm3||Thermal Neutron Cross Section||118barns/atom|
|Specific Heat @ 25°C||0.038cal/g°C||Magnetic Moment||7.62Bohr magnetons|
|Heat of Fusion||4.4k-cal/g-atom||Magnetic Susceptibility||26,000x10-6emu/mole|
|Heat of Vaporization||59k-cal/g-atom||Standard Electrode Potential||+2.1volts|