Uranium disulfide

Uranium disulfide
Identifiers
CAS Number	12039-14-4;
3D model (JSmol)	Interactive image;
ChemSpider	23349340;
EC Number	234-884-6;
PubChem CID	131700999;
	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
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]

References

↑ ^1.0 ^1.1 Noel, H.; Le Marouille, J.Y. (1984). "Crystal structure and properties of the uranium chalcogenides α-US2 and α-USe2". Journal of Solid State Chemistry (Elsevier BV) 52 (3): 197–202. doi:10.1016/0022-4596(84)90001-x. ISSN 0022-4596.
↑ Kohlmann, H.; Beck, H. P. (2000). "Uranium's valency in U₃S₅". Journal of Solid State Chemistry (Academic) 150 (2): 339. doi:10.1006/jssc.1999.8599. Bibcode: 2000JSSCh.150..336K.
↑ Picon, Marius; Flahaut, Jean (1953). "Dimorphism of the uranium disulfide, US₂". Compt. Rend. 237: 808–810.
↑ Assmann, Helmut; Stehle, Heinz (1981). "Weitere Uranverbindungen als Kernbrennstoffe". Handbuch der Anorganischen Chemie. Gmelin. U: Uran (Suppl. A3) (8th ed.). Berlin: Springer. pp. 210–211. doi:10.1007/978-3-662-10275-6. ISBN 978-3-662-10276-3.

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Original source: https://en.wikipedia.org/wiki/Uranium disulfide. Read more

[Noel1984-1] 1.0 ^1.1 Noel, H.; Le Marouille, J.Y. (1984). "Crystal structure and properties of the uranium chalcogenides α-US2 and α-USe2". Journal of Solid State Chemistry (Elsevier BV) 52 (3): 197–202. doi:10.1016/0022-4596(84)90001-x. ISSN 0022-4596.

[FromTbl-2] Kohlmann, H.; Beck, H. P. (2000). "Uranium's valency in U₃S₅". Journal of Solid State Chemistry (Academic) 150 (2): 339. doi:10.1006/jssc.1999.8599. Bibcode: 2000JSSCh.150..336K.

[Allo-3] Picon, Marius; Flahaut, Jean (1953). "Dimorphism of the uranium disulfide, US₂". Compt. Rend. 237: 808–810.

[Gmelin-4] Assmann, Helmut; Stehle, Heinz (1981). "Weitere Uranverbindungen als Kernbrennstoffe". Handbuch der Anorganischen Chemie. Gmelin. U: Uran (Suppl. A3) (8th ed.). Berlin: Springer. pp. 210–211. doi:10.1007/978-3-662-10275-6. ISBN 978-3-662-10276-3.

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Identifiers
CAS Number	12039-14-4
3D model (JSmol)	Interactive image
ChemSpider	23349340
EC Number	234-884-6
PubChem CID	131700999
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

Topic: Chemistry

References