Uranium diselenide

Uranium diselenide
Identifiers
CAS Number	12138-21-5;
3D model (JSmol)	Interactive image;
ChemSpider	74838;
ECHA InfoCard	100.032.029
EC Number	235-245-4;
PubChem CID	82939;
CompTox Dashboard (EPA)	DTXSID7065257 ;
	InChI InChI=1S/2Se.U Key: WIQPIQPRLFROPS-UHFFFAOYSA-N;
	SMILES [Se-2].[Se-2].[U+4];
Properties
Chemical formula	USe2
Molar mass	395.948 g/mol
Appearance	black crystalline solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Uranium diselenide is a compound of uranium and selenium. It has a β form that has orthorhombic crystal system. The family of crystals it matches is PbCl₂. The dimensions of the unit cell are a: 7.455 Å, b: 4.2320 Å, c= 8.964 Å. The compound has the unusual property of ferromagnetism, but only if the temperature is below 14 K.[1]

Tellurium can be substituted for selenium in varying quantities, expanding the lattice and increasing the ferromagnetic Curie temperature.[1]

References

Noël, H.; M. Potel; R. Troc; L. Shlyk (October 1996). "Crystal Structure and Physical Properties of β USe₂ and USe_2−xTe_x(x= 0.24 and 0.72)". Journal of Solid State Chemistry. 126 (1): 22–26. Bibcode:1996JSSCh.126...22N. doi:10.1006/jssc.1996.0304.

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[Noël-1] Noël, H.; M. Potel; R. Troc; L. Shlyk (October 1996). "Crystal Structure and Physical Properties of β USe₂ and USe_2−xTe_x(x= 0.24 and 0.72)". Journal of Solid State Chemistry. 126 (1): 22–26. Bibcode:1996JSSCh.126...22N. doi:10.1006/jssc.1996.0304.