• Latin name:
  Erbium
• English name:
  Erbium
• Year discovered:
  1843
• Discovered by:
  Carl Gustaf Mosander
• Country of Discovery:
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• Cost per 100 grams:
  238 USD
• CAS Number:
  CAS7440-52-0
• Electron shell:
  K2-L8-M18-N30-O8-P2-Q0-R0

Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements on Earth. As such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered.

• Atomic number:
  68
• Atomic weight (Relative atomic mass):
  167.259084222944 (g/mol)
• Density:
  9.066 (g/cm³)
• Melting point:
  1529.0°C = 2784.20°F = 1802.15K
• Boiling point:
  2868.0°C = 5194.40°F = 3141.15K
• Valence electrons:
  3
• Period:
  6
• Group:
  
• Block:
  f - block
• Emission spectrum:
  

• Phase:
  Solid

  
• Fusion heat:
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• Specific heat:
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• Thermal expansion:
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• Vaporization heat:
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• Electron configuration:
  [Xe] 4f12 6s2 = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f12 5s2 5p6 6s2
Oxidation states:

• -
• -
• -
• -
• -
• -
• -
• -
• +3
• -
• -
• -
• -
• -
• -
• Ion charge:
  Er³⁺
• The ionization potential of an atom:
  6.108 (eV)
• Atomic radius:
  226 (pm)
• Covalent radius:
  177 (pm)
• Van der Waals radius:
  235 (pm)

• Electrical conductivity:
  1162790.69767442 (S/m)
• Electrical type:
  Conductor
• Magnetic type:
  Paramagnetism
• Volume magnetic susceptibility:
  0.0341788
• Mass magnetic susceptibility:
  3.77 ⋅ 10^-6
• Molar magnetic susceptibility:
  6.30566 ⋅ 10^-7 (m³/mol)
• Resistivity:
  8.6 ⋅ 10^-7 (Ω · m)
• Superconducting point:
  ----

• Debye temperature:
  ----

• Colour:
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• CAS Number:
  CAS7440-52-0
• CID Number:
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• RTEC Number:
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• Brinell hardness:
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• Mohs hardness:
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• Vickers hardness:
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• Bulk modulus:
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• Young's modulus:
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• Liquid density:
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• Molar volume:
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• Poisson's ratio:
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• Shear modulus:
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• Speed of sound transmission:
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• Refractive index:
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• Thermal conductivity:
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• Electronegativity:
  1.24
• Valence electrons:
  3
• Electron affinity:
  30.1 kJ/mole

• Radioactive:
  No
• Half life:
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• Lifetime:
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• Neutron cross section, barn:
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• Universe contains "Erbium" at the rate of
  ----
• Sun contains "Erbium" at the rate of
  1 ⋅ 10^-5%
• Oceans contain "Erbium" at the rate of
  9.0 ⋅ 10^-11%
• Human body contains "Erbium" at the rate of
  ----
• The Earth's crust consists of "Erbium" at the rate of
  3.5 ⋅ 10^-4%
• Meteorites consist of "Erbium" at the rate of
  1.8 ⋅ 10^-5%