Chemistry:Uranium(IV) iodide

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Uranium(IV) iodide
UI4.png
__ U4+     __ I
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 236-735-0
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
Main hazards Radioactive
GHS pictograms GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
GHS Signal word 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. 1.0 1.1 Levy, J. H.; Taylor, J. C.; Waugh, A. B. (1980). "Crystal structure of uranium(IV) tetraiodide by x-ray and neutron diffraction" (in en). Inorganic Chemistry 19 (3): 672–674. doi:10.1021/ic50205a019. ISSN 0020-1669. 
  2. 2.0 2.1 Brauer, Georg (1978). Handbuch der Präparativen Anorganischen Chemie. II (3rd ed.). Stuttgart: Ferdinand Enke. p. 1218. ISBN 3-432-87813-3. 
HI He
LiI BeI2 BI3 CI4 NI3 I2O4,
I2O5,
I4O9
IF,
IF3,
IF5,
IF7
Ne
NaI MgI2 AlI3 SiI4 PI3,
P2I4
S ICl,
ICl3
Ar
KI CaI2 Sc TiI4 VI3 CrI3 MnI2 FeI2 CoI2 NiI2 CuI ZnI2 Ga2I6 GeI2,
GeI4
AsI3 Se IBr Kr
RbI SrI2 YI3 ZrI4 NbI5 Mo Tc Ru Rh Pd AgI CdI2 InI3 SnI4,
SnI2
SbI3 TeI4 I Xe
CsI BaI2   HfI4 TaI5 W Re Os Ir Pt AuI Hg2I2,
HgI2
TlI PbI2 BiI3 Po AtI Rn
Fr RaI2   Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
La Ce Pr Nd Pm SmI2 Eu Gd TbI3 Dy Ho Er Tm Yb Lu
Ac ThI4 Pa UI3,
UI4
Np Pu Am Cm Bk Cf EsI3 Fm Md No Lr