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Praseodymiun is a soft, silvery-yellow, malleable, ductile metal. More resistant to corrosion in air than some other rare earths, it develop a green oxide coating that spalls off when exposed to air. Praseodymium is never found free in nature, appearing only in combined form with other rare earths in various minerals. It should be stored under mineral oil or in an inert atmosphere. Similar to other rare earths, praseodymium forms brightly colored compounds.
|Property Name||Property Value||Property Name||Property Value|
|CAS #||7440-10-0||Covalent Radius||1.65Angstroms|
|Electrical Resistivity @ 298°C||68.0µΩ-cm|
|Melting Point||935°C||Crystal Structure||Hexagonal|
|Density||6.77g/cm3||Thermal Neutron Cross Section||11.2barns/atom|
|Themal Conductivity @ 50°C||0.28cal/cm2/cm/s/°C||Magnetic Moment||3.56Bohr magnetons|
|Specific Heat @ 25°C||0.048cal/g°C||Magnetic Susceptibility||5,320x10-6emu/mole|
|Heat of Fusion||1.60k-cal/g-atom||Tensile Strength||15,900psi|
|Heat of Vaporization||79k-cal/g-atom||Yield Strength||14,500psi|
|Atomic Volume||20.8W/D||Transformation Temperature||795°C|
|First Ionization Energy||133K-cal/g-mole||Standard Electrode Potential||+2.2volts|