Praseodymium (Pr)

Praseodymium (Pr)

Praseodymium ([Xe]5f36s2) (CAS 7440-10-0) is a soft, silvery-yellow, malleable, ductile metal. Praseodymium is never found free in nature, appearing only in combined form with other rare earths in various minerals. More resistant to corrosion in air than some other rare earths, it develops a green oxide coating that spalls off when exposed to air. It should be stored under mineral oil or in an inert atmosphere. Similar to other rare earths, praseodymium forms brightly colored compounds.

Lanthanide Salts > Metal Alloys>

Phase at STP: Solid

Common Oxidation States: +3

Number of Valence Electrons: 5

Electronegativity (Pauling): 1.1

First Ionization Energy: 133 kcal/mole

Covalent Radius: 1.65 Angstroms

Melting Point: 935°C

Boiling Point: 3030°C

Density: 6.77 g/cm3

Crystal Structure: Hexagonal

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Praseodymium foil, 0.1mm (0.004in) thick, 99% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium powder, -200 mesh, 99.9% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium powder, -40 mesh, 99.5% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium foil, 1.0mm (0.04in) thick, 99.5% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium rod, 12.7mm (0.5in) dia, 99.5% (metals basis excluding Ta), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium foil, 0.62mm (0.024 in.) thick, 99.5% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Praseodymium foil, 0.25mm (0.01in) thick, 99% (REO), Thermo Scientific™ Thermo Scientific™

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.
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