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| Properties | |
| Chemical formula | I3Np |
| Molar mass | 618 g·mol |
| Appearance | brown solid |
| Density | 6.82 g·cm |
| Melting point | 767 °C |
| Structure | |
| Crystal structure | orthorhombic |
| Space group | Ccmm (No. 63) |
| Lattice constant | a = 430 pm, b = 1403 pm, c = 995 pm |
| Related compounds | |
| Other anions | neptunium(III) fluoride neptunium(III) chloride neptunium(III) bromide |
| Other cations | uranium(III) iodide plutonium(III) iodide |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references | |
Neptunium(III) iodide is the iodide of neptunium with the chemical formula NpI3.
Preparation
Neptunium(III) iodide can be produced by the reaction of neptunium dioxide and aluminium iodide:
- 6 NpO2 + 8 AlI3 → 6 NpI3 + 4 Al2O3 + 3 I2
Properties
Neptunium(III) iodide is a hygroscopic brown solid with a melting point of 767 °C. It is orthorhombic (plutonium(III) bromide structure), space group Ccmm (No. 63), lattice parameters a = 430pm, b = 1403pm and c = 995pm.
References
- ^ Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils (ed.), Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, p. 1969, ISBN 0-12-352651-5
- Gmelins Handbuch der anorganischen Chemie, System Nr. 71, Transurane, Teil C, S. 154–155.
- Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3, S. 1269.
- C. Keller: Die Chemie des Neptuniums. In: Fortschr. chem. Forsch., 1969/70, 13/1, S. 69.
External reading
- Yoshida, Zenko; Johnson, Stephen G.; Kimura, Takaumi; Krsul, John R. (2006), Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean (eds.), "Neptunium", The Chemistry of the Actinide and Transactinide Elements, Dordrecht: Springer Netherlands, pp. 699–812, doi:10.1007/1-4020-3598-5_6, ISBN 978-1-4020-3555-5, retrieved 2023-09-15
- Keller, C. (1969), "Die Chemie des Neptuniums", Anorganische Chemie, Fortschritte der Chemischen Forschung (in German), vol. 13/1, Berlin/Heidelberg: Springer-Verlag, pp. 1–124, doi:10.1007/bfb0051170, ISBN 978-3-540-04488-8, retrieved 2023-09-15
| Neptunium compounds | |||
|---|---|---|---|
| Np(III) | |||
| Np(IV) |
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| Np(V) | |||
| Np(VI) | |||
| Np(VII) | |||
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