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]

Uranium diselenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.032.029 Edit this at Wikidata
EC Number
  • 235-245-4
  • InChI=1S/2Se.U
    Key: WIQPIQPRLFROPS-UHFFFAOYSA-N
  • [Se-2].[Se-2].[U+4]
Properties
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).

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

References

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  1. ^ a b Noël, H.; M. Potel; R. Troc; L. Shlyk (October 1996). "Crystal Structure and Physical Properties of β USe2 and USe2−xTex(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.