Uranium disulfide

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Uranium disulfide
Identifiers
3D model (
JSmol
)
ECHA InfoCard
 100.031.700 Edit this at Wikidata
  • InChI=1S/2S.U/q2*-2;+4
    Key: OYHHCKFHGQELGK-UHFFFAOYSA-N
SMILES
  • [S-2].[S-2].[U+4]
Properties
US2
Molar mass 302.160 g/mol
Appearance Black crystals
Structure[1]
Tetragonal (α-US2)
P4/ncc (No. 130)
a = 1029.3 pm, c = 637.4 pm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Uranium disulfide is an

radioactive and appears in the form of black crystals.[2]

Uranium disulfide has two

allotropic forms: α-uranium disulfide, which is stable above the transition temperature (about 1350 °C) and metastable below it, and β-uranium disulfide which is stable below this temperature.[3] The tetragonal crystal structure of α-US2 is identical to α-USe2.[1]

Uranium disulfide can be synthesized by reduction of gaseous hydrogen sulfide with uranium metal powder at elevated temperatures.[4]

References

  1. ^
    ISSN 0022-4596
    .
  2. doi:10.1006/jssc.1999.8599
    .
  3. ^ Picon, Marius; Flahaut, Jean (1953). "Dimorphism of the uranium disulfide, US2". Compt. Rend. 237: 808–810.
  4. LCCN 25-1383
    .
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