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

__ Es3+     __ I−
Names
IUPAC names Einsteinium triiodide Einsteinium(III) iodide
Identifiers
CAS Number	99644-28-7
3D model (JSmol)	Interactive image
ChemSpider	65322231
CompTox Dashboard (EPA)	DTXSID001030498
InChI InChI=1S/Es.3HI/h;3*1H/q+3;;;/p-3 Key: HAHWYACNRLFPJX-UHFFFAOYSA-K
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]