59

Pr

Praseodymium

140.91

Lathanide
Solid

Discovery

Von Welsbach, Baron Auer (1885)

Etymology

Greek

Meaning

Green twin

Electron configuration

Electron configuration

Crystal structure

Crystal structure

Double hexagonal close-packed

Physical Properties

Phase

  (at 21 °C and 101.325 kPa)

Solid

Melting point

  (at 101.325 kPa)

935.0 °C

1208.15 K

Boiling point

  (at 101.325 kPa)

3257.0 °C

3530.15 K

Density

  (at 21 °C and 101.325 kPa)

6.77 g/cm3

Electronegativity

1.13