Radium nitrate is a radioactive salt with the formula Ra(NO3)2. It is a white solid, but old samples appear yellowish-grey. Although radium chloride and radium bromide are less soluble than the corresponding barium salts, radium nitrate is more soluble than barium nitrate.[1][2] It decomposes at 280 °C to radium oxide.[citation needed]
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Other names
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3D model (JSmol)
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| Properties | |
| Ra(NO3)2 | |
| Molar mass | 350.01 g/mol |
| Appearance | White solid[1] |
| Melting point | 280 °C (536 °F; 553 K) (decomposes) |
| 13.9 g/100 ml | |
| Solubility in nitric acid | Insoluble |
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Other anions
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Radium carbonate |
Other cations
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Barium 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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Production
editRadium nitrate is produced by the reaction of radium carbonate or radium sulfate with nitric acid:[2]
- RaCO3 + HNO3 → Ra(NO3)2 + CO2 + H2O
References
edit- ^ a b Otto Erbacher (1930). "Löslichkeits-Bestimmungen einiger Radiumsalze" [Solubility determinations of some radium salts]. Chemische Berichte (in German). 63 (1): 141–156. doi:10.1002/cber.19300630120.
- ^ a b Kirby, H. W.; Salutsky, Murrell L. (1964). The Radiochemistry of Radium (PDF). National Academies Press. pp. 4–8.
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