Uranium disulfide
Appearance
Identifiers | |
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3D model (JSmol)
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ECHA InfoCard | 100.031.700 |
PubChemCID
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CompTox Dashboard(EPA)
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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
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Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).
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Uranium disulfideis aninorganicchemical compoundofuraniuminoxidation state+4 andsulfurin oxidation state -2. It isradioactiveand appears in the form of black crystals.[2]
Uranium disulfide has twoallotropicforms: 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-US2is identical to α-USe2.[1]
Uranium disulfide can be synthesized by reduction of gaseoushydrogen sulfidewith uranium metal powder at elevated temperatures.[4]
References[edit]
- ^abNoel, H.; Le Marouille, J.Y. (1984). "Crystal structure and properties of the uranium chalcogenides α-US2 and α-USe2".Journal of Solid State Chemistry.52(3). Elsevier BV: 197–202.doi:10.1016/0022-4596(84)90001-x.ISSN0022-4596.
- ^Kohlmann, H.; Beck, H. P. (2000) [Oct 1, 1999]. "Uranium's valency in U3S5".Journal of Solid State Chemistry.150(2). Academic: 339.Bibcode:2000JSSCh.150..336K.doi:10.1006/jssc.1999.8599.
- ^Picon, Marius; Flahaut, Jean (1953). "Dimorphism of the uranium disulfide, US2".Compt. Rend.237:808–810.
- ^Assmann, Helmut; Stehle, Heinz (1981) [Mid-1979]. "Weitere Uranverbindungen als Kernbrennstoffe" [Other uranium compounds as nuclear fuels]. In Buschbeck, Karl-Christian; Keller, Cornelius (eds.).Handbuch der Anorganischen Chemie[Inorganic Chemistry Handbook]. Gmelin (in German). Vol. U: Uran (Suppl. A3) (8th ed.). Berlin: Springer. pp. 210–211.doi:10.1007/978-3-662-10275-6.ISBN978-3-662-10276-3.LCCN25-1383.