Neptunium(IV) nitrate

Neptunium(IV) nitrate  Names

Other names

Neptunium tetranitrate

Identifiers

CAS Number

* 25933-55-5 Y

3D model (JSmol)

* Interactive image

EC Number |

* 247-352-3

PubChem CID

* 3015250

InChI

* InChI=1S/4NO3.Np/c4*2-1(3)4;/q4*-1;

Key: XHXJHKCJMVVEJC-UHFFFAOYSA-N

SMILES

* [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Np]

Properties

Chemical formula

| Np(NO3)4
Molar mass | 485.02
Appearance  | Grey crystals

Solubility in water

| Soluble
Hazards
GHS Signal word | Warning
Related compounds

Related compounds

| Plutonium(IV) nitrate

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Neptunium(IV) nitrate is an inorganic compound, a salt of neptunium and nitric acid with the chemical formula Np(NO3)4.[1][2][3] The compound forms gray crystals, dissolves in water, and forms crystal hydrates.[4][5]

## Synthesis

Addition of dilute nitric acid to freshly prepared neptunium(IV) hydroxide:[6][7]

Np(OH)4+4HNO3 → Np(NO3)4+4H2O

## Physical properties

Neptunium(IV) nitrate forms gray hygroscopic crystals.

It is soluble in water.

It forms a crystal hydrate of the composition Np(NO3)4•2H2O.

## References

1. ↑ Horner, D. E. (1961) (in en). Plutonium Extraction from Nitrate and Sulfate Solutions by Amines and Organophosphorus Compounds. Oak Ridge National Laboratory. p. 17. https://books.google.com/books?id=7ESj8bTz_UQC&dq=Neptunium(IV)+nitrate&pg=PA17. Retrieved 17 August 2021.
2. ↑ Ikeda-Ohno, Atsushi; Hennig, Christoph; Rossberg, André; Funke, Harald; Scheinost, Andreas C.; Bernhard, Gert; Yaita, Tsuyoshi (15 September 2008). "Electrochemical and Complexation Behavior of Neptunium in Aqueous Perchlorate and Nitrate Solutions". Inorganic Chemistry 47 (18): 8294–8305. doi:10.1021/ic8009095. ISSN 0020-1669. PMID 18698766. https://pubs.acs.org/doi/abs/10.1021/ic8009095. Retrieved 17 August 2021.
3. ↑ Guillaume, B.; Moulin, J.P.; Maurice, Ch. (27-29 November 1984). "Chemical Properties of Neptunium Applied to Neptunium Management in Extraction Cycles of Purex Process.". https://inis.iaea.org/collection/NCLCollectionStore/_Public/16/080/16080207.pdf.
4. ↑ Alian, A.; Haggag, A. (1 May 1967). "Amine extraction and determination of activity coefficients of neptunium and plutonium nitrates" (in en). Journal of Inorganic and Nuclear Chemistry 29 (5): 1355–1363. doi:10.1016/0022-1902(67)80378-6. ISSN 0022-1902. https://www.sciencedirect.com/science/article/abs/pii/0022190267803786. Retrieved 17 August 2021.
5. ↑ Koltunov, V. S.; Taylor, R. J.; Savilova, O. A.; Zhuravleva, G. I.; Denniss, I. S.; Wallwork, A. L. (1 January 1997). "Kinetics and Mechanism of the Oxidation of Neptunium(IV) by Nitric Acid in Tributyl Phosphate Solution" (in en). Radiochimica Acta 76 (1–2): 45–54. doi:10.1524/ract.1997.76.12.45. ISSN 2193-3405. https://www.degruyter.com/document/doi/10.1524/ract.1997.76.12.45/html. Retrieved 18 August 2021.
6. ↑ Seaborg, Glenn Theodore (1949) (in en). The Transuranium Elements: Research Papers. McGraw-Hill. p. 1102. ISBN 9780598917584. https://books.google.com/books?id=YEgNAQAAIAAJ&q=Neptunium(IV)+nitrate. Retrieved 17 August 2021.
7. ↑ Laidler, J. B. (1 January 1966). "Neptunium nitrates" (in en). Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 780–784. doi:10.1039/J19660000780. ISSN 0022-4944. https://pubs.rsc.org/en/content/articlelanding/1966/J1/j19660000780. Retrieved 18 August 2021.

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Neptunium compounds

Np(III)|

* NpF3
* NpCl3
* NpBr3
* NpI3

Np(IV)|

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

Np(V)|

* NpF5

Np(VI)|

* NpF6

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Salts and covalent derivatives of the nitrate ion

HNO3 |  |  |  | He

|
|
|
|

LiNO3 | Be(NO3)2 | B(NO3)−4 | C  | NO−3,
NH4NO3 | O  | FNO3 | Ne
NaNO3 | Mg(NO3)2 | Al(NO3)3 | Si  | P  | S  | ClONO2 | Ar
KNO3 | Ca(NO3)2 | Sc(NO3)3 | Ti(NO3)4 | VO(NO3)3 | Cr(NO3)3 | Mn(NO3)2 | Fe(NO3)3,
Fe(NO3)2 | Co(NO3)2,
Co(NO3)3 | Ni(NO3)2 | Cu(NO3)2 | Zn(NO3)2 | Ga(NO3)3 | Ge  | As  | Se  | Br  | Kr
RbNO3 | Sr(NO3)2 | Y(NO3)3 | Zr(NO3)4 | Nb  | Mo  | Tc  | Ru  | Rh  | Pd(NO3)2 | AgNO3 | Cd(NO3)2 | In  | Sn  | Sb(NO3)3 | Te  | I  | Xe(NO3)2
CsNO3 | Ba(NO3)2 |  | Hf  | Ta  | W  | Re  | Os  | Ir  | Pt  | Au  | Hg2(NO3)2,
Hg(NO3)2 | Tl(NO3)3,
TlNO3 | Pb(NO3)2 | Bi(NO3)3
BiO(NO3) | Po  | At  | Rn
FrNO3 | Ra(NO3)2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La(NO3)3 | Ce(NO3)3,
Ce(NO3)4 | Pr  | Nd(NO3)3 | Pm  | Sm  | Eu(NO3)3 | Gd(NO3)3 | Tb(NO3)3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac(NO3)3 | Th(NO3)4 | Pa  | UO2(NO3)2 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | Es  | Fm  | Md  | No  | Lr

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