Periodic Table of Elements

Element Praseodymium - Pr

Comprehensive data on the chemical element Praseodymium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Praseodymium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Praseodymium Menu

Overview of Praseodymium

Praseodymium's Name in Other Languages

  • Latin: Praseodymium
  • Czech: Praseodym
  • Croatian: Praseodimij
  • French: Praséodyme
  • German: Praseodym - r
  • Italian: Praseodimio
  • Norwegian: Praseodym
  • Portuguese: Praséodimio
  • Russian: Празеодим
  • Spanish: Prosedímio
  • Swedish: Praseodym

Atomic Structure of Praseodymium

Chemical Properties of Praseodymium

Physical Properties of Praseodymium

  • Atomic Mass Average: 140.9077
  • Boiling Point: 3785K 3512°C 6354°F
  • Coefficient of lineal thermal expansion/K-1: 6.79E-6
  • Conductivity
    Electrical: 0.0148 106/cm Ω
    Thermal: 0.125 W/cmK
  • Density: 6.77g/cc @ 300K
  • Description:
    A malleable and soft rare earth metal that reacts slowly with oxygen and reacts rapidly with water.
  • Elastic Modulus:
    • Bulk: 28.8/GPa
    • Rigidity: 14.8/GPa
    • Youngs: 37.3/GPa
  • Enthalpy of Atomization: 368 kJ/mole @ 25°C
  • Enthalpy of Fusion: 6.89 kJ/mole
  • Enthalpy of Vaporization: 296.8 kJ/mole
  • Flammablity Class:
  • Freezing Point: see melting point
  • Hardness Scale
    • Brinell: 481 MN m-2
    • Vickers: 400 MN m-2
  • Heat of Vaporization: 296.8kJ/mol
  • Melting Point: 1204K 931°C 1708°F
  • Molar Volume: 20.8 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.19J/gK

Regulatory / Health

  • CAS Number
    • 7440-10-0
  • OSHA Permissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSH Recommended Exposure Limit (REL)
    • No limits set by NIOSH
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: n/a
    • Bone/p.p.m: n/a
    • Liver/p.p.m: n/a
    • Muscle/p.p.m: n/a
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a
  • Discovery Year: 1885
  • Name Origin:
    Greek: prasios (green) and didymos (twin); from its green salts.
  • Abundance of Praseodymium:
    • Earth's Crust/p.p.m.: 9.5
    • Seawater/p.p.m.:
      • Atlantic Suface: 0.0000004
      • Atlantic Deep: 0.0000007
      • Pacific Surface: 4.4E-07
      • Pacific Deep: 0.000001
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 4.6
  • Sources of Praseodymium:
    Obtained from monazite and bastnasite ores. Annual world production is around 2400 tons. Primary mining areas are USA, Brazil, India, Sri Lanka and Australia.
  • Uses of Praseodymium:
    Used for coloring glass and ceramic glazes. Also used with neodymium to make lenses for glass maker's goggles because they filter out the yellow light present in glass blowing.
  • Additional Notes:

Praseodymium Menu


A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Related Resources

Citing this page

If you need to cite this page, you can copy this text: