Uranium(IV) iodide

__ U4+     __ I−
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.381
EC Number
  • 236-735-0
  • InChI=1S/4HI.U/h4*1H;/q;;;;+4/p-4
    Key: PUBUIOWBJCONDZ-UHFFFAOYSA-J
  • I[U](I)(I)I
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
Occupational safety and health (OHS/OSH):
Main hazards
 Radioactive
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H300, H330, H373, H411
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Uranium(IV) iodide, also known as uranium tetraiodide, is an inorganic chemical compound. It is a salt of uranium in oxidation state +4 and iodine.

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

  1. 1 2 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.
  2. 1 2 Brauer, Georg (1978). Handbuch der Präparativen Anorganischen Chemie. Vol. II (3rd ed.). Stuttgart: Ferdinand Enke. p. 1218. ISBN 3-432-87813-3.
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