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Uranium disulfide information


Uranium disulfide
Identifiers
CAS Number
  • 12039-14-4
3D model (JSmol)
  • Interactive image
ECHA InfoCard 100.031.700 Edit this at Wikidata
PubChem CID
  • 131700999
CompTox Dashboard (EPA)
  • DTXSID2065204 Edit this at Wikidata
InChI
  • InChI=1S/2S.U/q2*-2;+4
    Key: OYHHCKFHGQELGK-UHFFFAOYSA-N
SMILES
  • [S-2].[S-2].[U+4]
Properties
Chemical formula
US2
Molar mass 302.160 g/mol
Appearance Black crystals
Structure[1]
Crystal structure
Tetragonal (α-US2)
Space group
P4/ncc (No. 130)
Lattice constant
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).
Infobox references

Uranium disulfide is an inorganic chemical compound of uranium in oxidation state +4 and sulfur in oxidation state -2. It is 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]

  1. ^ a b Cite error: The named reference Noel1984 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference FromTbl was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Allo was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gmelin was invoked but never defined (see the help page).

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and 50 °C (122 °F). Sulfur is insoluble in water but soluble in carbon disulfide and, to a lesser extent, in other nonpolar organic solvents, such as benzene...

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off-gassing of volatile chemicals and sulfurous gases — including carbon disulfide, carbonyl sulfide, and hydrogen sulfide. The emissions worsen as temperature...

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edges instead of corners, forming parallel chains similarly to silicon disulfide (SiS 2) and silicon diselenide (SiSe 2): it quickly returns to forming...

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structure, is a useful high-temperature lubricant akin to molybdenum disulfide. Nitride compounds often have large band gaps, thus nitrides are usually...

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monoxide, (GeO). The dioxide, GeO2, can be obtained by roasting germanium disulfide (GeS 2), and is a white powder that is only slightly soluble in water...

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