Uranium(IV) iodide
{{Chembox
| ImageFile = UI4.png
| ImageSize =
| Section1 = {{Chembox Identifiers
| CASNo = 13470-22-9
| CASNo_Ref = {{Cascite|correct|CAS}}
| ChemSpiderID = 75343
| EC_number = 236-735-0
| PubChem = 83508
| SMILES = I[U](I)(I)I
| StdInChI=1S/4HI.U/h4*1H;/q;;;;+4/p-4
| StdInChIKey = PUBUIOWBJCONDZ-UHFFFAOYSA-J
}}
| Section2 = {{Chembox Properties
| Formula = UI4
| MolarMass = 745.647 g/mol
| Appearance = black hygroscopic crystals}}
| Section3 = {{Chembox Structure
| CrystalStruct = monoclinic
| SpaceGroup = C2/c, No. 15
| LattConst_a = 1396.7 pm
| LattConst_b = 847.2 pm
| LattConst_c = 751 pm
| LattConst_beta = 90.54
}}
| Section4 = {{Chembox Hazards
| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|300|330|373|411}}
| PPhrases = {{P-phrases|}}
| MainHazards = Radioactive
}}
}}
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.{{cite book|first=Georg|last=Brauer|title=Handbuch der Präparativen Anorganischen Chemie|edition=3rd|volume=II|publisher=Ferdinand Enke|location=Stuttgart|year=1978|isbn=3-432-87813-3|page=1218}}
Properties
Uranium tetraiodide is a black solid and forms needle-like crystals. Upon heating, it dissociates into uranium triiodide and iodine gas. It crystallizes in the monoclinic crystal system, space group C2/c.{{Cite journal|last1=Levy|first1=J. H.|last2=Taylor|first2=J. C.|last3=Waugh|first3=A. B.|date=1980|title=Crystal structure of uranium(IV) tetraiodide by x-ray and neutron diffraction|journal=Inorganic Chemistry|language=en|volume=19|issue=3|pages=672–674|doi=10.1021/ic50205a019|issn=0020-1669}}
References
{{reflist}}
{{Uranium compounds}}
{{Iodides}}
{{Actinide halides}}
Category:Uranium(IV) compounds
{{Inorganic-compound-stub}}