Neptunium(III) iodide is the

iodide An iodide ion is I−. Compounds with iodine in formal oxidation state −1 are called iodides. In everyday life, iodide is most commonly encountered as a component of iodized salt, which many governments mandate. Worldwide, iodine deficiency ...

neptunium Neptunium is a chemical element; it has chemical symbol, symbol Np and atomic number 93. A radioactivity, radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar Syste ...

with the chemical formula NpI₃.

Preparation

Neptunium(III) iodide can be produced by the reaction of

neptunium dioxide Neptunium(IV) oxide, or neptunium dioxide, is a radioactive, olive green cubic crystalline solid with the formula NpO2. It is one of two stable oxides of neptunium, the other being neptunium(V) oxide. It emits both α- and γ-particles. Produc ...

and

aluminium iodide Aluminium iodide is a chemical compound containing aluminium and iodine. Invariably, the name refers to a compound of the composition , formed by the reaction of aluminium and iodine or the action of on metal. The hexahydrate is obtained fr ...

Georg Brauer Georg Karl Brauer (11 April 1908 in Bochum – 26 February 2001 in Freiburg im Breisgau Freiburg im Breisgau or simply Freiburg is the List of cities in Baden-Württemberg by population, fourth-largest city of the German state of Baden-Wü ...

(Hrsg.), unter Mitarbeit von

Marianne Baudler Marianne Baudler (27 April 1921 – 5 March 2003) was a German chemist. She is known for her research on phosphorus. Life Marianne Baudler was born in Stettin. She started studying Chemistry at the Technische Hochschule Dresden in April 1940 and ...

u. a.: ''Handbuch der Präparativen Anorganischen Chemie.'' 3., umgearbeitete Auflage. Band II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3, S. 1269. :

Properties

Neptunium(III) iodide is a hygroscopic brown solid with a melting point of 767 °C. It is

orthorhombic In crystallography, the orthorhombic crystal system is one of the 7 crystal systems. Orthorhombic Lattice (group), lattices result from stretching a cubic crystal system, cubic lattice along two of its orthogonal pairs by two different factors, res ...

(

plutonium(III) bromide Plutonium(III) bromide is an inorganic salt of bromine and plutonium with the formula PuBr3. This radioactive green solid has few uses, however its crystal structure is often used as a structural archetype in crystallography. Crystal structure ...

structure), space group Ccmm (No. 63), lattice parameters a = 430pm, b = 1403pm and c = 995pm.C. Keller: ''Die Chemie des Neptuniums.'' In: '' Fortschr. chem. Forsch.'', 1969/70, ''13/1'', S. 69.

References

External reading

* * {{Actinide halides Neptunium(III) compounds Iodides Actinide halides