From Wikipedia, the free encyclopedia
Neptunium(IV) nitrate
Names
Other names
Neptunium tetranitrate
Identifiers
ECHA InfoCard
100.043.033
EC Number
InChI=1S/4NO3.Np/c4*2-1(3)4;/q4*-1;
Key: XHXJHKCJMVVEJC-UHFFFAOYSA-N
[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Np+4]
Properties
Np(NO3 )4
Molar mass
485.02
Appearance
Grey crystals
Soluble
Hazards
GHS labelling :
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).
Chemical compound
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]
N
p
(
O
H
)
4
+
4
H
N
O
3
→
N
p
(
N
O
3
)
4
+
4
H
2
O
{\displaystyle {\mathsf {Np(OH)_{4}+4HNO_{3}\ {\xrightarrow {}}\ Np(NO_{3})_{4}+4H_{2}O}}}
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 •2H2 O.
References
^ 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 .
^ 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 .
^ 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 .
^ 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 .
^ 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 .
^ Seaborg, Glenn Theodore (1949).
The Transuranium Elements: Research Papers .
McGraw-Hill . p. 1102.
ISBN
9780598917584 . Retrieved 17 August 2021 .
^ 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 .
Np(III) Np(IV) Organoneptunium(IV) compounds
Np(V) Np(VI) Np(VII)
Salts and covalent derivatives of the
nitrate ion