Einsteinium(III) iodide

Einsteinium triiodide is an iodide of the synthetic actinide einsteinium which has the molecular formula EsI₃. This crystalline salt is an amber-coloured solid.[1] It glows red in the dark due to einsteinium's intense radioactivity.

Einsteinium(III) iodide

__ Es^3+     __ I^−
Names
IUPAC names Einsteinium triiodide Einsteinium(III) iodide
Identifiers
CAS Number	99644-28-7
3D model (JSmol)	Interactive image
ChemSpider	65322231
SMILES I[Es](I)I
Properties
Chemical formula	EsI3
Molar mass	632.796 g/mol
Appearance	amber-coloured solid, glows red in the dark[1]
Structure
Crystal structure	Hexagonal
Space group	R3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

It crystallises in the hexagonal crystal system in the space group R3 with the lattice parameters a = 753 pm and c = 2084.5 pm with six formula units per unit cell. Its crystal structure is isotypic with that of bismuth(III) iodide.[2][3]

References

1. Arnold F. Holleman, Nils Wiberg: Lehrbuch der Anorganischen Chemie, 102nd Edition, de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1, p. 1969.
2. R. G. Haire, ORNL Report 5485, 1978.
3. J. R. Peterson: "Chemical Properties of Einsteinium: Part II", in: G. T. Seaborg (ed.): Proceedings of the 'Symposium Commemorating the 25th Anniversary of Elements 99 and 100', 23. January 1978; Report LBL-7701, April 1979, pp. 55–64.

Further reading

• Haire, Richard G. (2006). "Einsteinium". In Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (PDF). 3 (3rd ed.). Dordrecht, the Netherlands: Springer. pp. 1577–1620. doi:10.1007/1-4020-3598-5_12. Archived from the original (PDF) on 2010-07-17.