Identifiers | |
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3D model (
JSmol)
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ChemSpider | |
ECHA InfoCard | 100.013.787 |
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
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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 | |
cubic, cI80, Monoclinic | |
Ia-3, No. 206, C2/m, No. 12 | |
Hazards | |
Lethal dose or concentration (LD, LC): | |
LD50 (
median dose)
|
5000 mg/kg (rat, oral) |
Safety data sheet (SDS) | External MSDS |
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).
|
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, space group C2/m, No. 12) [3] and cubic ( cI80, space group Ia3, No. 206). [4] The cubic structure is similar to that of manganese(III) oxide.
It may be formed by ignition of europium metal. [5] [6]
It can react with acids to form the corresponding europium(III) salts.
Europium is the most reactive rare-earth element... It swiftly oxidizes in air, ignites in the range of 150–180°C to form Eu3+ oxide (Eu2O3).