Chemistry:Neptunium(IV) oxalate
From HandWiki
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3D model (JSmol)
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PubChem CID
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| Properties | |
| Np(C2O4)2 | |
| Molar mass | 413.04 |
| Appearance | Green crystals |
| slightly soluble | |
| Hazards | |
| GHS Signal word | Danger |
| Related compounds | |
Related compounds
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Thorium dioxalate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Neptunium (IV) oxalate[1] is an inorganic compound, a salt of neptunium and oxalic acid with the chemical formula Np(C2O4)2.[2] The compound is slightly soluble in water, forms crystalline hydrates—green crystals.[3][4]
Synthesis
Neptunium(IV) oxalate is formed by the oxalic acid precipitation of neptunium (IV) solutions:[5]
- [math]\displaystyle{ \mathsf{ NpCl_4 + 2H_2C_2O_4 \ \xrightarrow{}\ Np(C_2O_4)_2\cdot 6H_2O\downarrow + 4HCl } }[/math]
Physical properties
Neptunium(IV) oxalate forms a crystalline hydrate of the composition Np(C2O4)2 • 6H2O with green crystals.
It is insoluble in acetone, and slightly soluble in water.[6]
Chemical properties
Neptunium(IV) oxalate decomposes on heating:[7]
- [math]\displaystyle{ \mathsf{ Np(C_2O_4)_2 \ \xrightarrow{400^oC}\ NpO_2 + 2CO_2 + 2CO } }[/math]
Applications
Neptunium(IV) oxalate is used as an intermediate product in the purification of neptunium.[8][9]
References
- ↑ Alburger, D. E.; Perlman, I.; Rasmussen, J. O.; Hyde, Earl K.; Seaborg, Glenn T.; Bishop, George R.; Wilson, Richard; Devons, S. et al. (6 December 2012) (in en). Kernreaktionen III / Nuclear Reactions III. Springer Science & Business Media. p. 234. ISBN 978-3-642-45878-1. https://books.google.com/books?id=FqT1CAAAQBAJ&dq=Neptunium(IV)+oxalate&pg=PA234. Retrieved 6 August 2021.
- ↑ Лидин, Ростислав; Молочко, Вадим; Андреева, Лариса (2 February 2019) (in ru). Константы неорганических веществ. Справочник. Litres. p. 52. ISBN 978-5-04-077039-7. https://books.google.com/books?id=-cQ0DwAAQBAJ&q=%D0%9E%D0%BA%D1%81%D0%B0%D0%BB%D0%B0%D1%82+%D0%BD%D0%B5%D0%BF%D1%82%D1%83%D0%BD%D0%B8%D1%8F%28IV%29&pg=PA52. Retrieved 6 August 2021.
- ↑ Luerkens, D. W. (1 July 1983) (in English). Neptunium (IV) oxalate solubility. [22, 45, 60/sup 0/C]. doi:10.2172/5904308. https://digital.library.unt.edu/ark:/67531/metadc1102341/. Retrieved 6 August 2021.
- ↑ (in en) Encyclopedia of physics. Springer-Verlag. 1957. p. 234. https://books.google.com/books?id=x8UrAAAAYAAJ&q=neptunium(IV)+oxalate. Retrieved 6 August 2021.
- ↑ Luerkens, D. W. (1983) (in en). Two-stage precipitation of neptunium (IV) oxalate. Du Pont de Nemours (E.I.) and Co.. https://inis.iaea.org/search/search.aspx?orig_q=RN:15001203. Retrieved 6 August 2021.
- ↑ Luerkens, D. W. (1983). Neptunium (IV) oxalate solubility. [22, 45, 60/sup 0/C]. Savannah River Laboratory; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. https://searchworks.stanford.edu/view/11342714. Retrieved 6 August 2021.
- ↑ Kozlova, R. D.; Karelin, A. I.; Lobas, O. P.; Matyukha, V. A. (1984). "Thermal decomposition of neptunium (4) oxalate" (in Russian). Radiokhimiya 26 (3): 311–316. ISSN 0033-8311. https://inis.iaea.org/search/search.aspx?orig_q=RN:16037484. Retrieved 6 August 2021.
- ↑ Бекман, Игорь (2 July 2021) (in ru). Неорганическая химия. Радиоактивные элементы 2-е изд., испр. и доп. Учебник для СПО. Litres. p. 272. ISBN 978-5-04-309059-1. https://books.google.com/books?id=8EskEAAAQBAJ&dq=%D0%9E%D0%BA%D1%81%D0%B0%D0%BB%D0%B0%D1%82+%D0%BD%D0%B5%D0%BF%D1%82%D1%83%D0%BD%D0%B8%D1%8F(IV)&pg=PA272. Retrieved 6 August 2021.
- ↑ Morss, L. R.; Edelstein, Norman M.; Fuger, Jean (21 October 2010) (in en). The Chemistry of the Actinide and Transactinide Elements (Set Vol.1-6): Volumes 1-6. Springer Science & Business Media. p. 726. ISBN 978-94-007-0211-0. https://books.google.com/books?id=9vPuV3A0UGUC&dq=Neptunium(IV)+oxalate&pg=PA726. Retrieved 6 August 2021.
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