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Periodic Table of Elements

Element Europium – Eu

Comprehensive data on the chemical element Europium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Europium. 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 studies. Using the "Periodic Table of Elements Quick Navigation" graphic at the bottom of the sidebar menu, one can quickly jump from chemical element to chemical element.

Europium Menu

• Europium Page One
  • Overview of Europium
  • Europium's Name in Other Languages
  • Atomic Structure of Europium
  • Chemical Properties of Europium
  • Physical Properties of Europium
  • Regulatory / Health
  • Who/When/Where/How
• Europium Page Two
  • Nuclides / Isotopes
  • Potential Parent Nuclides

Overview of Europium

Europium's Name in Other Languages

• Latin: Europium
• Czech: Europium
• Croatian: Europij
• French: Europium
• German: Europium - s
• Italian: Europio
• Norwegian: Europium
• Portuguese: Európio
• Russian:
• Spanish: Európio
• Swedish: Europium

Atomic Structure of Europium

• Atomic Radius: 2.56Å
• Atomic Volume: 28.9cm³/mol
• Covalent Radius: 1.85Å
• Cross Section (Thermal Neutron Capture)_a/barns: 4600
• Crystal Structure: Cubic body centered

  

• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f⁷ 5s²p⁶ 6s²

• Electrons per Energy Level: 2,8,18,25,8,2

  Shell Model
  

• Ionic Radius: 0.947Å
• Filling Orbital: 4f⁷
• Number of Electrons (with no charge): 63
• Number of Neutrons (most common/stable nuclide): 89
• Number of Protons: 63
• Oxidation States: 3,2
• Valence Electrons: 4f⁷ 6s²

Chemical Properties of Europium

• Electrochemical Equivalent: 1.8899g/amp-hr
• Electron Work Function: 2.5eV
• Electronegativity: 1.2 (Pauling); 1.01 (Allrod Rochow)
• Heat of Fusion: 9.21kJ/mol
• Incompatibilities:

• Ionization Potential
  • First: 5.67
  • Second: 11.245
  • Third: 24.926
• Valence Electron Potential (-eV): 45.6

Physical Properties of Europium

• Atomic Mass Average: 151.965
• Boiling Point: 1870K 1597°C 2907°F
• Coefficient of lineal thermal expansion/K^-1: 32E^-6
• Conductivity

  Electrical: 0.0112 10⁶/cm
  Thermal: 0.139 W/cmK

• Density: 5.24g/cc @ 300K
• Description:

  Soft Silver rare earth metal.

• Elastic Modulus:
  • Bulk: 8.3/GPa
  • Rigidity: 7.9/GPa
  • Youngs: 18/GPa
• Enthalpy of Atomization: 180 kJ/mole @ 25°C
• Enthalpy of Fusion: 9.21 kJ/mole
• Enthalpy of Vaporization: 143.5 kJ/mole
• Flammablity Class:
• Freezing Point: see melting point
• Hardness Scale
  • Vickers: 167 MN m^-2
• Heat of Vaporization: 143.5kJ/mol
• Melting Point: 1095K 822°C 1512°F
  
• Molar Volume: 28.98 cm³/mole
• Physical State (at 20°C & 1atm): Solid
• Specific Heat: 0.18J/gK
• Vapor Pressure = 144Pa@822°C

Regulatory / Health

• CAS Number
  • 7440-53-1
• 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: 1901
• Name Origin:

  Named after Europe.

• Abundance of Europium:
  • Earth's Crust/p.p.m.: 2.1
  • Seawater/p.p.m.:
    • Atlantic Suface: 9E-08
    • Atlantic Deep: 1.5E-07
    • Pacific Surface: 0.0000001
    • Pacific Deep: 2.7E-07
  • Atmosphere/p.p.m.: N/A
  • Sun (Relative to H=1E¹²): 5
• Sources of Europium:

  Chief ores are monazite and bastnasite. Around 400 tons are produced world wide each year. Primary mining areas are USA, Brazil, India, Sri Lanka, Australia and China.

• Uses of Europium:

  Used with yttrium oxide to make red phosphors for color televisions. Also used in making thin-film superconductor alloys.

• Additional Notes:

[Last update: 2/22/2007]

Notes below

Europium Menu

• Europium Page One
  • Overview of Europium
  • Europium's Name in Other Languages
  • Atomic Structure of Europium
  • Chemical Properties of Europium
  • Physical Properties of Europium
  • Regulatory / Health
  • Who/When/Where/How
• Europium Page Two
  • Nuclides / Isotopes
  • Potential Parent Nuclides

Related Resources

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• Chemical Database
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Citing this page

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

Kenneth Barbalace. Periodic Table of Elements - Europium – Eu. EnvironmentalChemistry.com. 1995 - 2008. Accessed on-line: 5/9/2008
http://EnvironmentalChemistry.com/yogi/periodic/Eu.html
.