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  • 12061-16-4
  • Er2O3
  • 99.8%
  • 3-12mm
  • NO
  • 235-045-7



Erbium(III) oxide, is synthesized from the lanthanide metal erbium.It has a pink color with a cubic crystal structure. Under certain conditions erbium oxide can also have a hexagonal form.

Chemical formula:Er2O3

Molar mass: 382.56 g/mol

Appearance: pink crystals

Density: 8.64 g/cm3

Melting point: 2,344 °C (4,251 °F; 2,617 K)

Boiling point: 3,290 °C (5,950 °F; 3,560 K)

Solubility in water:insoluble in water

Magnetic susceptibility (χ):+73,920·10−6 cm3/mol

Crystal structure:Cubic, cI80


Erbium(III) oxide is used for vacuum deposition electrical, optical and photoluminescenc, gate dielectrics in semi conductor devices, and in Biomedicine.