Europium monoselenide

Europium monoselenide

Names
Other names Europium selenide, europium(II) selenide, selanylideneeuropium
Identifiers
CAS Number	12020-66-5
3D model (JSmol)	Interactive image
ChemSpider	74728
ECHA InfoCard	100.031.499
EC Number	234-662-9
PubChem CID	82810
CompTox Dashboard (EPA)	DTXSID101014196
InChI InChI=1S/Eu.Se Key: GCSIELJPGDPWNK-UHFFFAOYSA-N
SMILES [Eu]=[Se]
Properties
Chemical formula	EuSe
Molar mass	230.92
Appearance	black crystals
Density	6.45 g/cm^3
Melting point	1,213 °C (2,215 °F; 1,486 K)
Structure
Crystal structure	cubic, Fm3m
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373
Precautionary statements	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). Infobox references

Europium monoselenide is a binary inorganic compound of europium and selenium with the chemical formula EuSe.^[1] The compound forms black crystals.

Synthesis

• 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

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

1. "Europium Selenide". American Elements. Retrieved 3 April 2023.
2. 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.
3. 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.
4. 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.