Neptunium(IV) nitrate

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Contents

Neptunium(IV) nitrate
Neptunium(IV) nitrate solution.png
Names
Other names
Neptunium tetranitrate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.043.033 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 247-352-3
PubChem CID
  • 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
AppearanceGrey 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).

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.

Related Research Articles

The actinide or actinoid series encompasses at least the 14 metallic chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through nobelium. The actinide series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide.

<span class="mw-page-title-main">Neptunium</span> Chemical element with atomic number 93 (Np)

Neptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after. A neptunium atom has 93 protons and 93 electrons, of which seven are valence electrons. Neptunium metal is silvery and tarnishes when exposed to air. The element occurs in three allotropic forms and it normally exhibits five oxidation states, ranging from +3 to +7. Like all actinides, it is radioactive, poisonous, pyrophoric, and capable of accumulating in bones, which makes the handling of neptunium dangerous.

<span class="mw-page-title-main">Copper(II) nitrate</span> Chemical compound

Copper(II) nitrate describes any member of the family of inorganic compounds with the formula Cu(NO3)2(H2O)x. The hydrates are blue solids. Anhydrous copper nitrate forms blue-green crystals and sublimes in a vacuum at 150-200 °C. Common hydrates are the hemipentahydrate and trihydrate.

<span class="mw-page-title-main">Iron(III) nitrate</span> Chemical compound

Iron(III) nitrate, or ferric nitrate, is the name used for a series of inorganic compounds with the formula Fe(NO3)3.(H2O)n. Most common is the nonahydrate Fe(NO3)3.(H2O)9. The hydrates are all pale colored, water-soluble paramagnetic salts.

<span class="mw-page-title-main">Mercury(I) nitrate</span> Chemical compound

Mercury(I) nitrate is an inorganic compound, a salt of mercury and nitric acid with the formula Hg2(NO3)2. A yellow solid, the compound is used as a precursor to other Hg22+ complexes. The structure of the hydrate has been determined by X-ray crystallography. It consists of a [H2O-Hg-Hg-OH2]2+ center, with a Hg-Hg distance of 254 pm.

<span class="mw-page-title-main">Cerium nitrates</span> Chemical compound

Cerium nitrate refers to a family of nitrates of cerium in the +3 or +4 oxidation state. Often these compounds contain water, hydroxide, or hydronium ions in addition to cerium and nitrate. Double nitrates of cerium also exist.

<span class="mw-page-title-main">Titanium(IV) nitrate</span> Chemical compound

Titanium nitrate is the inorganic compound with formula Ti(NO3)4. It is a colorless, diamagnetic solid that sublimes readily. It is an unusual example of a volatile binary transition metal nitrate. Ill defined species called titanium nitrate are produced upon dissolution of titanium or its oxides in nitric acid.

<span class="mw-page-title-main">Zirconium nitrate</span> Chemical compound

Zirconium nitrate is a volatile anhydrous transition metal nitrate salt of zirconium with formula Zr(NO3)4. It has alternate names of zirconium tetranitrate, or zirconium(IV) nitrate.

<span class="mw-page-title-main">Thorium(IV) nitrate</span> Chemical compound

Thorium(IV) nitrate is a chemical compound, a salt of thorium and nitric acid with the formula Th(NO3)4. A white solid in its anhydrous form, it can form tetra- and pentahydrates. As a salt of thorium it is weakly radioactive.

<span class="mw-page-title-main">Terbium(III) nitrate</span> Chemical compound

Terbium(III) nitrate is an inorganic chemical compound, a salt of terbium and nitric acid, with the formula Tb(NO3)3. The hexahydrate crystallizes as triclinic colorless crystals with the formula [Tb(NO3)3(H2O)4]·2H2O. It can be used to synthesize materials with green emission.

Indium(III) nitrate is a nitrate salt of indium which forms various hydrates. Only the pentahydrate has been crystallographically verified. Other hydrates are also reported in literature, such as the trihydrate.

<span class="mw-page-title-main">Plutonium(IV) nitrate</span> Chemical compound

Plutonium (IV) nitrate is an inorganic compound, a salt of plutonium and nitric acid with the chemical formula Pu(NO3)4. The compound dissolves in water and forms crystalline hydrates as dark green crystals.

<span class="mw-page-title-main">Ytterbium(III) nitrate</span> Chemical compound

Ytterbium(III) nitrate is an inorganic compound, a salt of ytterbium and nitric acid with the chemical formula Yb(NO3)3. The compound forms colorless crystals, dissolves in water, and also forms crystalline hydrates.

Lutetium(III) nitrate is an inorganic compound, a salt of lutetium and nitric acid with the chemical formula Lu(NO3)3. The compound forms colorless crystals, dissolves in water, and also forms crystalline hydrates. The compound is poisonous.

Curium(III) nitrate is an inorganic compound, a salt of curium and nitric acid with the chemical formula Cm(NO3)3.

<span class="mw-page-title-main">Thulium(III) nitrate</span> Chemical compound

Thulium(III) nitrate is an inorganic compound, a salt of thulium and nitric acid with the chemical formula Tm(NO3)3. The compound forms dark-green crystals, readily soluble in water, also forms crystalline hydrates.

Polonium tetranitrate is an inorganic compound, a salt of polonium and nitric acid with the chemical formula Po(NO3)4. The compound is radioactive, forms white crystals.

Neptunium(VII) oxide-hydroxide is a chemical compound which has neptunium in its highest oxidation state of +7. This compound reacts with basic salts such as potassium hydroxide to form neptunates (NpO53-) and water.

Neptunium compounds are compounds containing the element neptunium (Np). Neptunium has five ionic oxidation states ranging from +3 to +7 when forming chemical compounds, which can be simultaneously observed in solutions. It is the heaviest actinide that can lose all its valence electrons in a stable compound. The most stable state in solution is +5, but the valence +4 is preferred in solid neptunium compounds. Neptunium metal is very reactive. Ions of neptunium are prone to hydrolysis and formation of coordination compounds.

Plutonium(IV) iodate is an inorganic compound with the chemical formula Pu(IO3)4, it is a salt which decomposes into plutonium(IV) oxide above 540 °C. It can be generated in the reaction of plutonium(IV) nitrate and iodic acid, but this method cannot obtain a pure product; Another preparation method is the reaction of plutonium(IV) nitrate or plutonium(IV) chloride with potassium iodate and dilute nitric acid. It can crystallize in the tetragonal crystal system with space group P42/n.

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.