Protactinyl nitrate
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Other names
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| PaO(NO3)3 | |
| Molar mass | 433.05 g/mol |
| Appearance | White solid[1] |
| Melting point | 400 °C (752 °F; 673 K) (decomposition) |
| Hydrolysis[1] | |
| Solubility | Soluble in fuming nitric acid[1] |
| Related compounds | |
Other cations
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Uranyl nitrate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Protactinyl nitrate, protactinium(V) oxynitrate, or erroneously known as protactinium nitrate, is a radioactive chemical compound with the formula PaO(NO3)3·xH2O (1.5 ≤ x ≤ 4). It is a white solid that readily hydrolyzes to protactinium(V) oxide in moist air. This compound is a common commercial source of protactinium.[2]
Preparation and decomposition
[edit]Protactinyl nitrate was first prepared in 1966 by reacting protactinium(V) chloride or protactinium(V) bromide with fuming nitric acid. Lower concentrations of nitric acid cannot be used, due to the hydrolysis of the compound.[1]
Protactinyl nitrate decomposes at 400 °C to protactinium(V) oxide.[2][1]
References
[edit]- ^ a b c d e D. Brown; P. J. Jones (1966). "Quinquevalent protactinium, niobium, and tantalum nitrates and nitrato-complexes". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 733–737. doi:10.1039/J19660000733.
- ^ a b R. Grossmann; H.J. Maier; J. Szerypo; H.U. Friebel (2008). "Preparation of 231Pa targets". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 590 (1–3): 122–125. doi:10.1016/j.nima.2008.02.084.