Uranium disulfide explained

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.

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. The tetragonal crystal structure of α-US₂ is identical to α-USe₂.

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

References

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Notes and References

1. Book: Handbuch der Anorganischen Chemie. Inorganic Chemistry Handbook. de. 8th. U: Uran (Suppl. A3). Gmelin. Springer. 1981. Berlin. Helmut. Assmann. Heinz. Stehle. Karl-Christian. Buschbeck. Cornelius. Keller. 55. Mid-1979. 25-1383. 978-3-662-10276-3. 10.1007/978-3-662-10275-6. Weitere Uranverbindungen als Kernbrennstoffe. Other uranium compounds as nuclear fuels. 210–211.
2. 10.1006/jssc.1999.8599. Journal of Solid State Chemistry. 150. 2000. Uranium's valency in U₃S₅. H.. Kohlmann. H. P.. Beck. 2 . Oct 1, 1999. Academic. 339. 2000JSSCh.150..336K .
3. Noel . H. . Le Marouille . J.Y. . Crystal structure and properties of the uranium chalcogenides α-US2 and α-USe2 . Journal of Solid State Chemistry . Elsevier BV . 52 . 3 . 1984 . 0022-4596 . 10.1016/0022-4596(84)90001-x . 197–202.
4. Dimorphism of the uranium disulfide, US₂ . Picon . Marius . Flahaut . Jean . Compt. Rend. . 1953 . 237 . 808–810 .