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erbium
Image: Wikimedia Commons

erbium

Chemical element with symbol Er and atomic number 68

Chemical elementchemical elementQ1849

Also known as Er · 68Er · element 68

Symbol
Atomic number
Mass
Melting point
  • 1,795 K
Boiling point
  • 3,173 K
Density
  • 9,045 kg/m³
Discovered by
Discovered
  • 1843

Overview

All data

112 statements · 25% with external sources · numbers in brackets are citations

Named after
Canonical SMILES
Formula
Electronegativity
  • 1
Unicode character
Made from material
Has use
Part of
Ionic radius
  • 0.89 ångström charge number: 3 · coordination number: 6
  • 1 ångström charge number: 3 · coordination number: 8
Space group
Crystal system
Thermal conductivity
  • 15 watt per metre kelvin
Electrical conductivity
  • 1,160,000 siemens per metre
Subclass of
Point group
Has characteristic
Ionization energy
Electron configuration
IPA transcription
Oxidation state
  • 3
  • 0
  • 1
  • 2
Atomic radius
  • 175 picometre
Covalent radius
  • 189 picometre

On other databases

55 identifiers linking erbium across the web's reference databases