Uranium diselenide

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title: "Uranium diselenide" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["uranium(iv)-compounds", "selenides", "dichalcogenides"] topic_path: "general/uranium-iv-compounds" source: "https://en.wikipedia.org/wiki/Uranium_diselenide" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| ImageFile = | ImageSize = 150px | Section1 = {{Chembox Identifiers | CASNo = 12138-21-5 | EINECS=235-245-4 | PubChem = 82939 | ChemSpiderID = 74838 | StdInChI=1S/2Se.U | StdInChIKey = WIQPIQPRLFROPS-UHFFFAOYSA-N | SMILES = [Se-2].[Se-2].[U+4] | Section2 = {{Chembox Properties | Formula = USe2 | MolarMass = 395.948 g/mol | Appearance = black crystalline solid

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.

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

References

References

  1. Noël, H.. (October 1996). "Crystal Structure and Physical Properties of β USe2 and USe2−xTex(x= 0.24 and 0.72)". Journal of Solid State Chemistry.

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uranium(iv)-compoundsselenidesdichalcogenides