| Names | |
|---|---|
| Other names
Neptunyl hydroxide | |
| Identifiers | |
3D model (JSmol) |
|
| |
| |
| Properties | |
| NpO2(OH)3 | |
| Molar mass | 320.02 g/mol |
| Appearance | Black solid |
| 10 mg/l | |
| Solubility | Soluble in nitric acid and 1 M potassium hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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.[1]
- NpO2(OH)3 + 3KOH → K3NpO5 + 3H2O
Neptunium(VII) oxide-hydroxide is stable in an alkaline solution, however, it is slowly reduced to Np(VI) in an acidic solution. In water, it forms a greenish solution.[1] This compound decomposes slowly to an oxidized solid.[2]
Production
Neptunium(VII) oxide-hydroxide is produced by the oxidation of Np(VI) in alkaline solution with ozone, then neutralized with nitric acid to precipitate out the neptunium(VII) oxide-hydroxide.
References
- 1 2 V.I.Spitsyn; A.D.Gelman; N.N.Krot; M.P.Mefodiyeva; F.A.Zakharova; Yu.A.Komkov; V.P.ShilovI.; V.Smirnova (1968). "Heptavalent state of neptunium and plutonium". Journal of Inorganic and Nuclear Chemistry. Institute of Physical Chemistry of the Academy of Sciences of the USSR. 31 (9): 2733–2745. doi:10.1016/0022-1902(69)80187-9.
- ↑ Robert J. Lemire (2001). Lemire, Robert (ed.). Chemical Thermodynamics of Neptunium and Plutonium. Elsevier Science. p. 116. ISBN 9780444503794.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.