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Curium(III) iodide

Names
Other names Curium triiodide
Identifiers
CAS Number	14696-85-6
3D model (JSmol)	Interactive image
PubChem CID	101943143 (charge error)
InChI InChI=1S/Cm.3HI/h;3*1H/q+3;;;/p-3Key: UVXBBRRWLDYFRE-UHFFFAOYSA-K
SMILES ...
Properties
Chemical formula	CmI3
Molar mass	628 g·mol
Appearance	white crystals
Related compounds
Related compounds	Americium triiodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Curium(III) iodide is the chemical compound with the formula CmI₃. Since all isotopes of curium are only artificially produced, the compound has no natural occurrence.

Synthesis

Elemental curium and iodine can be reacted to synthesize curium(III) iodide.

2Cm + 3I₂ → 2CmI₃

Also by the reaction of curium(III) chloride with ammonium iodide:

CmCl₃ + 3NH₄I → CmI₃ + 3NH₄Cl

Physical properties

Curium(III) iodide is a colorless ionic compound consisting of Cm and I ions. It forms white crystals the hexagonal crystal system in the space group R₃ (space group no. 148) with the lattice parameters a = 744 pm and c = 2040 pm with six units per unit cell. Its crystal structure is isotypic with that of bismuth(III) iodide.

References

1. Lumetta, Gregg J.; Thompson, Major C.; Penneman, Robert A.; Eller, P. Gary (2006). "Curium". The Chemistry of the Actinide and Transactinide Elements. Springer Netherlands. pp. 1397–1443. doi:10.1007/1-4020-3598-5_9. ISBN 978-1-4020-3598-2. Retrieved 3 July 2023.
2. Brown, David; Canterford, J. H.; Colton, Ray (1968). Halides of the Transition Elements: Halides of the lanthanides and actinides, by D. Brown. Wiley. p. 260. ISBN 978-0-470-10840-6. Retrieved 3 July 2023.
3. "WebElements Periodic Table » Curium » curium triiodide". winter.group.shef.ac.uk. Retrieved 3 July 2023.
4. Seaborg, G. T.; James, R. A.; Ghiorso, A. (1949). "The Transuranium Elements". Science. 104 (2704). McGraw-Hill: 1554–1571. JSTOR 1675046. Retrieved 3 July 2023.
5. ^ Asprey, L. B.; Keenan, T. K.; Kruse, F. H. (July 1965). "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium" (PDF). Inorganic Chemistry. 4 (7): 985–986. doi:10.1021/ic50029a013. ISSN 0020-1669. S2CID 96551460. Retrieved 3 July 2023.
6. Koch, Günter (5 October 2013). Transurane: Teil C: Die Verbindungen (in German). Springer-Verlag. p. 154. ISBN 978-3-662-11547-3. Retrieved 3 July 2023.
7. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3046. ISBN 978-0-412-30120-9. Retrieved 3 July 2023.

• Curium compounds
• Nuclear materials
• Iodides
• Actinide halides