68
Er
167.26
Erbium
Element 68 · 167.26 u · f-block
lanthanide
Gives a pink color to glass and porcelain. Essential for erbium-doped fiber amplifiers that power the internet.
Phase (STP)
Solid
Melting Point
1529 °C
Boiling Point
2868 °C
Density
9.066 g/cm³
Electronegativity
1.24
Atomic Radius
175 pm
Ionization Energy
589 kJ/mol
Electron Affinity
30 kJ/mol
Discovered
1843 · Carl Gustaf Mosander
Electron Configuration
[Xe] 4f12 6s2
Electron Orbitals
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