Americium(III) iodide

Americium(III) iodide or americium triiodide is the chemical compound, a salt composed of americium and iodine with the formula AmI₃.

Americium(III) iodide

Names
IUPAC name Americium(III) iodide
Other names Americium triiodide
Identifiers
CAS Number	13813-47-3 [1]
3D model (JSmol)	Interactive image
InChI InChI=1S/Am.3HI/h;3*1H/q+3;;;/p-3 Key: KZIHWWKUCWPQNZ-UHFFFAOYSA-K
SMILES [I-].[I-].[I-].[Am+3]
Properties
Chemical formula	AmI3
Molar mass	624 g·mol−1
Related compounds
Other anions	Americium(III) fluoride Americium(III) chloride Americium(III) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Americium(III) iodide can be prepared by reacting americium(III) chloride with ammonium iodide:^[2]

AmCl₃ + 3 NH₄I → AmI₃ + 3NH₄Cl

Properties

Americium(III) iodide takes the form of yellow crystals. The crystal form is orthorhombic. It melts around 960 °C. The density is 6.9 g/cm³.^[1] The compound consists of Am³⁺ and I⁻ ions. It crystallizes in the trigonal crystal system in the space group R3 (space group no. 148) with the lattice parameters a = 742 pm and c = 2055 pm and six formula units per unit cell. Its crystal structure is isotypic with bismuth(III) iodide.^[2][3]