Neptunium(IV) nitrate

Neptunium(IV) nitrate

Names
Other names Neptunium tetranitrate
Identifiers
CAS Number	25933-55-5  Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.043.033
EC Number	247-352-3
InChI InChI=1S/4NO3.Np/c4*2-1(3)4;/q4*-1;+4 Key: SSHOWSNFBYZAEF-UHFFFAOYSA-N
SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Np+4]
Properties
Chemical formula	Np(NO3)4
Molar mass	485.02
Appearance	Grey crystals
Solubility in water	Soluble
Hazards
GHS labelling:
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 + 4 HNO₃ → Np(NO₃)₄ + 4 H₂O

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). Plutonium Extraction from Nitrate and Sulfate Solutions by Amines and Organophosphorus Compounds. Oak Ridge National Laboratory. p. 17. 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 . 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" (PDF). Retrieved 17 August 2021.
4. Alian, A.; Haggag, A. (1 May 1967). "Amine extraction and determination of activity coefficients of neptunium and plutonium nitrates" . Journal of Inorganic and Nuclear Chemistry . 29 (5): 1355–1363. doi:10.1016/0022-1902(67)80378-6. ISSN   0022-1902 . 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" . Radiochimica Acta. 76 (1–2): 45–54. doi:10.1524/ract.1997.76.12.45. ISSN   2193-3405. S2CID   99652660 . Retrieved 18 August 2021.
6. Seaborg, Glenn Theodore (1949). The Transuranium Elements: Research Papers. McGraw-Hill. p. 1102. ISBN   9780598917584 . Retrieved 17 August 2021.
7. Laidler, J. B. (1 January 1966). "Neptunium nitrates" . Journal of the Chemical Society A: Inorganic, Physical, Theoretical : 780–784. doi:10.1039/J19660000780. ISSN   0022-4944 . Retrieved 18 August 2021.