Europium(III) oxide

Europium(III) oxide (Eu2O3), is a chemical compound of europium and oxygen. It is widely used as a red or blue phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors. It is also an agent for the manufacture of fluorescent glass. Europium fluorescence is used in the anti-counterfeiting phosphors in Euro banknotes.[2]

Europium oxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.787
UNII
Properties
Eu2O3
Molar mass 351.926 g/mol
Appearance white to light-pink solid powder
Odor odorless
Density 7.42 g/cm3
Melting point 2,350 °C (4,260 °F; 2,620 K)[1]
Boiling point 4,118 °C (7,444 °F; 4,391 K)
Negligible
+10,100·10−6 cm3/mol
Thermal conductivity 2.45 W/(m K)
Structure
Monoclinic, Cubic
Hazards
Safety data sheet External MSDS
Lethal dose or concentration (LD, LC):
5000 mg/kg (rat, oral)
Related compounds
Other anions
 Europium(III) chloride
Other cations
 Samarium(III) oxide, Gadolinium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Europium oxide has two common structures: Monoclinic (mS30, SpaceGroup = C2/m, No. 12) and cubic (cI80, SpaceGroup = Ia-3, No. 206). The cubic structure is similar to that of manganese(III) oxide.

It may be formed by ignition of europium metal.

It can react with acids to form the corresponding europium(III) salts.

  • Cubic Eu2O3
  • Monoclinic Eu2O3
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References
  1. Webelements Europium trioxide
  2. Europium and the Euro


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