Uranium(IV) iodide
Uranium(IV) iodide, also known as uranium tetraiodide, is an inorganic chemical compound of uranium in oxidation state +4.
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| Identifiers | |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.381  |
CompTox Dashboard (EPA) |
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| Properties | |
| UI4 | |
| Molar mass | 745.647 g/mol |
| Appearance | black hygroscopic crystals |
| Structure[1] | |
| monoclinic | |
| C2/c, No. 15 | |
a = 1396.7 pm, b = 847.2 pm, c = 751 pm α = 90°, β = 90.54°, γ = 90° | |
| Hazards | |
EU classification (DSD) (outdated) |
Radioactive |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Preparation
Uranium tetraiodide can be prepared from the reaction between uranium and an excess of iodine.[2]
Properties
Uranium tetraiodide is a black solid and forms needle-like crystals. Upon heating, it dissociates into uranium triiodide and iodine gas.[2] It crystallizes in the monoclinic crystal system, space group C2/c.[1]
References
- Levy, J. H.; Taylor, J. C.; Waugh, A. B. (1980). "Crystal structure of uranium(IV) tetraiodide by x-ray and neutron diffraction". Inorganic Chemistry. 19 (3): 672–674. doi:10.1021/ic50205a019. ISSN 0020-1669.
- Brauer, Georg (1978). Handbuch der Präparativen Anorganischen Chemie. II (3rd ed.). Stuttgart: Ferdinand Enke. p. 1218. ISBN 3-432-87813-3.
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