Neptunium(III) iodide is the iodide of neptunium with the chemical formula NpI3.

Neptunium(III) iodide
Identifiers
3D model (JSmol)
  • InChI=1S/3HI.Np/h3*1H;/q;;;+3/p-3
    Key: CZAMOQBPJFUDFF-UHFFFAOYSA-K
  • [I-].[I-].[I-].[Np+3]
Properties
I3Np
Molar mass 618 g·mol−1
Appearance brown solid[1]
Density 6.82 g·cm−3[2]
Melting point 767 °C[1]
Structure
orthorhombic
Ccmm (No. 63)
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).

Preparation

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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

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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

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  1. ^ a b 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

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  • 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