Americium(III) iodide explained

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

Preparation

Americium(III) iodide can be prepared by reacting americium(III) chloride with ammonium iodide:^[1]

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. The compound consists of Am³⁺ and I⁻ ions. It crystallizes in the trigonal crystal system in the space group R (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]

Notes and References

1. Asprey . L. B. . Keenan . T. K. . Kruse . F. H. . Jul 1965 . Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium . Inorganic Chemistry . en . 4 . 7 . 985–986 . 10.1021/ic50029a013 . 96551460 . 0020-1669.
2. Gmelins Handbuch der anorganischen Chemie, System No. 71, Transurane, Teil C, pp. 154.