Europium monoselenide
| Names | |
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| Other names
Europium selenide, europium(II) selenide, selanylideneeuropium
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.499 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| EuSe | |
| Molar mass | 230.92 |
| Appearance | black crystals |
| Density | 6.45 g/cm3 |
| Melting point | 1,213 °C (2,215 °F; 1,486 K) |
| Structure | |
| cubic, Fm3m | |
| Hazards | |
| GHS labelling: | |
  
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| Danger | |
| H301, H331, H373 | |
| P260, P261, P301+P310, P304+P340, P405, P501 | |
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 monoselenide is a binary inorganic compound of europium and selenium with the chemical formula EuSe.[1] The compound forms black crystals.
Synthesis
[edit]- Heating stoichiometric amounts of pure substances in a vacuum ampoule at 800 °C:[2]
- Eu + Se → EuSe
- Heating of europium(II) oxalate with an excess of selenium in a hydrogen current:
- EuC2O4 + Se + H2 → EuSe + H2O + CO2 + CO
Physical properties
[edit]Europium monoselenide forms black (or brown) crystals of cubic syngony, spatial group Fm3m, cell parameters a = 0.6185 nm, Z = 4.[3][4]
Ferromagnetic at curie temperature 7 K.
References
[edit]- ^ "Europium Selenide". American Elements. Retrieved 3 April 2023.
- ^ Klemm, Wilhelm; Senff, Heinz (5 May 1939). "Messungen an zwei- und vierwertigen Verbindungen der seltenen Erden. VIII. Chalkogenide des zweiwertigen Europiums". Zeitschrift für anorganische und allgemeine Chemie (in German). 241 (2–3): 259–263. doi:10.1002/zaac.19392410212. ISSN 0863-1786. Retrieved 3 April 2023.
- ^ McGuire, T. R.; Shafer, M. W. (1 March 1964). "Ferromagnetic Europium Compounds". Journal of Applied Physics. 35 (3): 984–988. Bibcode:1964JAP....35..984M. doi:10.1063/1.1713568. ISSN 0021-8979. Retrieved 3 April 2023.
- ^ Subhadra, K. G.; Raghavendra Rao, B.; Sirdeshmukh, D. B. (1 June 1992). "X-ray determination of the Debye-Waller factors and Debye temperatures of europium monochalcogenides". Pramana. 38 (6): 681–683. Bibcode:1992Prama..38..681S. doi:10.1007/BF02875064. ISSN 0973-7111. S2CID 123290263. Retrieved 3 April 2023.
| Europium(II) | |||
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| Europium(III) |
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