Europium(III) oxide

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Europium oxide
CAS number 1308-96-9 YesY
PubChem 159371
ChemSpider 3441840 YesY
Jmol-3D images Image 1
Molecular formula Eu2O3
Molar mass 351.926 g/mol
Appearance White powder.
Density 7.40 g/cm3
Melting point 2350 °C[1]
Solubility in water Negligible
Crystal structure Monoclinic, Cubic
MSDS External MSDS
Main hazards Non-Toxic
Related compounds
Other anions Europium(III) chloride
Other cations Samarium(III) oxide, Gadolinium(III) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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 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.