Neptunium(III) iodide

Neptunium(III) iodide

Identifiers
CAS Number	37501-52-3
3D model (JSmol)	Interactive image
PubChem CID	145816493
InChI InChI=1S/3HI.Np/h3*1H;/q;;;+3/p-3 Key: CZAMOQBPJFUDFF-UHFFFAOYSA-K
SMILES [I-].[I-].[I-].[Np+3]
Properties
Chemical formula	I3Np
Molar mass	618 g·mol−1
Appearance	brown solid [1]
Density	6.82 g·cm−3 [2]
Melting point	767 °C [1]
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 [77 °F], 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: ^[3]

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. ^[4]

References

1. 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
2. Gmelins Handbuch der anorganischen Chemie , System Nr. 71, Transurane, Teil C, S. 154–155.
3. 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.
4. 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