Europium(III) oxide
Appearance
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Identifiers | |
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3D model (
JSmol ) |
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ChemSpider | |
ECHA InfoCard
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100.013.787 |
PubChem CID
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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
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2.45 W/(m K) |
Structure | |
Monoclinic
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Ia-3, No. 206, C2/m, No. 12 | |
Hazards | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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5000 mg/kg (rat, oral) |
Safety data sheet (SDS) | External MSDS |
Related compounds | |
Other anions
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Europium(III) chloride |
Other cations
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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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Europium(III) oxide (Eu2O3), is a chemical compound of
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
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It may be formed by ignition of europium metal.[5][6]
It can react with acids to form the corresponding europium(III) salts.
Gallery
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Cubic Eu2O3
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Monoclinic Eu2O3
References
- ^ Webelements Europium trioxide
- ^ "Europium and the Euro". Archived from the original on 2009-08-04. Retrieved 2009-06-04.
- ^ "ICSD Entry: 631453". Cambridge Structural Database: Access Structures. Cambridge Crystallographic Data Centre. Retrieved 2022-07-04.
- .
- ISBN 978-0-12-813840-3.
- ^ "Europium". ScienceDirect. Elsevier. Retrieved 2022-07-04.
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).