Europium(III) nitride
Chemical compound From Wikipedia, the free encyclopedia
Europium(III) nitride is a binary inorganic compound of europium and nitrogen with the chemical formula EuN.[1]
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| Other names
Europium mononitride, azanylidyneuropium, nitridoeuropium | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.496 |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| EuN | |
| Molar mass | 165.971 g·mol−1 |
| Appearance | black crystals |
| Density | 6.57 g/cm3 |
| reacts with water | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis
Europium(III) nitride can be produced via the reaction of elemental europium in an ammonia stream in corundum boats in silica glass tubes. The reaction takes place at 700 °C.[2]
- 2Eu + 2NH3 → 2EuN + 3H2
In this reaction, europium is oxidized and the hydrogen in ammonia is reduced.
Physical properties
Europium(III) nitride shows Van Vleck paramagnetism[3] and crystallizes in the rock salt structure with a = 501.779(6) pm.[4][5][6] Thin films of rare earth nitrides, including europium(III) nitride, tend to form oxides in the presence of oxygen.[7] The enthalpy of formation of EuN is: ΔH0 = 217.6±25.1 kJ/mol.[8] The band gap for europium(III) nitride was calculated to be 2.08 eV.[9]
Europium(III) nitride forms black crystals and reacts with water.
Uses
EuN is a semiconductor.[10]
References
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