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.

## Contents

* 1 Preparation
* 2 Properties
* 3 References
* 4 External reading

## Preparation

Neptunium(III) iodide can be produced by the reaction of neptunium dioxide and aluminium iodide:[3]

6 NpO
2 \+ 8 AlI
3 → 6 NpI
3 \+ 4 Al

3 \+ 3 I

## 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. ↑ 1.0 1.1 Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry, 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" (in en), 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, http://link.springer.com/10.1007/1-4020-3598-5_6, retrieved 2023-09-15

* Keller, C. (1969), "Die Chemie des Neptuniums" (in de), Anorganische Chemie, Fortschritte der Chemischen Forschung (Berlin/Heidelberg: Springer-Verlag) 13/1: pp. 1–124, doi:10.1007/bfb0051170, ISBN 978-3-540-04488-8, http://link.springer.com/10.1007/BFb0051170, retrieved 2023-09-15

* v
* t
* e

Neptunium compounds

Np(III)|

* NpF3
* NpCl3
* NpBr3
* NpI3

Np(IV)|

* NpF4
* NpCl4
* NpBr4
* NpO2
* Np(C8H8)2

Np(V)|

* NpF5

Np(VI)|

* NpF6

HI |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3 | CI4 | NI3 | I2O4,
I2O5,
I4O9 | IF,
IF3,
IF5,
IF7 | Ne
NaI | MgI2 | AlI3 | SiI4 | PI3,
P2I4 | S  | ICl,
ICl3 | Ar
KI | CaI2 | Sc  | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2,
GeI4 | AsI3 | Se  | IBr | Kr
RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo  | Tc  | Ru  | Rh  | Pd  | AgI | CdI2 | InI3 | SnI4,
SnI2 | SbI3 | TeI4 | I  | Xe
CsI | BaI2 |  | HfI4 | TaI5 | W  | Re  | Os  | Ir  | Pt  | AuI | Hg2I2,
HgI2 | TlI | PbI2 | BiI3 | Po  | AtI | Rn
Fr  | RaI2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La  | Ce  | Pr  | Nd  | Pm  | SmI2 | Eu  | Gd  | TbI3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac  | ThI4 | Pa  | UI3,
UI4 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | EsI3 | Fm  | Md  | No  | Lr

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