Curium(III) iodide

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-3 Key: UVXBBRRWLDYFRE-UHFFFAOYSA-K;
	SMILES ...;
Properties
Chemical formula	CmI3
Molar mass	628 g·mol−1
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.^[1]^[2]^[3] 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.^[4]

2Cm + 3I₂ → 2CmI₃

Also by the reaction of curium(III) chloride with ammonium iodide:^[5]^[6]

CmCl₃ + 3NH₄I → CmI₃ + 3NH₄Cl

Physical properties

Curium(III) iodide is a colorless ionic compound consisting of Cm³⁺ 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.^[5]^[7]

References

^ 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.
^ 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.
^ "WebElements Periodic Table » Curium » curium triiodide". winter.group.shef.ac.uk. Retrieved 3 July 2023.
^ 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.
^ ^a ^b 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.
^ 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.
^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3046. ISBN 978-0-412-30120-9. Retrieved 3 July 2023.

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[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.

[IC-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.

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v t e Curium compounds
Curium(III)	Cm(OH)₃ Cm₂O₃ CmF₃ CmCl₃ CmBr₃ CmI₃ Cm(NO₃)₃ CmN Cm₂(C₂O₄)₃
Curium(IV)	CmO₂ CmF₄
Curium(VI)	CmF₆