碳酸镭
化合物
碳酸镭是一种无机化合物，化学式为RaCO3，有强放射性。它可以形成正交晶系晶体，空间群Pmcn。[2]
| 碳酸镭 | |||
|---|---|---|---|
| |||
| 英文名 | radium carbonate | ||
| 识别 | |||
| CAS号 | 7116-98-5 
| ||
| 性质 | |||
| 化学式 | RaCO3 | ||
| 摩尔质量 | 286.011 g·mol⁻¹ | ||
| 溶解性（水） | 0.05 g/L（25°C）[1] | ||
| 若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |||
制备
- Ra2+ + CO32- → RaCO3↓
性质及用途
碳酸镭可以和酸反应，生成其它镭化合物：
- RaCO3 + 2 HNO3 → Ra(NO3)2 + 2 H2O
在室温时，碳酸镭在碳酸铵或氯化铵浓溶液中的溶解度比碳酸钡大10倍，借此可将镭与钡分离。[4]它可用于制造镭铍中子源。[5]
参考文献
- ^ Matyskin, Artem V.; Ebin, Burçak; Allard, Stefan; Torapava, Natallia; Eriksson, Lars; Persson, Ingmar; Brown, Paul L.; Ekberg, Christian. Disordered Crystal Structure and Anomalously High Solubility of Radium Carbonate. Inorganic Chemistry. July 21, 2023, 62 (30): 12038–12049. PMC 10394661
. PMID 37477287. doi:10.1021/acs.inorgchem.3c01513.
- ^ Weigel, F.; Trinkl, A. Crystal chemistry of radium. V. Radium salts of inorganic anions. Radiochimica Acta, 1973. 19 (4): 199-202. ISSN: 0033-8230.
- ^ Artem V. Matyskin, Burçak Ebin, Mikhail Tyumentsev, Stefan Allard, Gunnar Skarnemark, Henrik Ramebäck, Christian Ekberg. Disassembly of old radium sources and conversion of radium sulfate into radium carbonate for subsequent dissolution in acid. Journal of Radioanalytical and Nuclear Chemistry. 2016-11, 310 (2): 589–595 [2020-12-10]. ISSN 0236-5731. doi:10.1007/s10967-016-4927-x （英语）.
- ^ Nikitin, B. A. Studies on the analytical chemistry of radium. II. Reactions of pure radium. Trav. inst. elat radium (U. S. S. R.), 1937. 3. pp 228-237. CAN31: 32676.
- ^ Bedrich, Fridrich. Preparation of radium-beryllium neutron sources. Sb. Ref. Celostatni Radiochem. Konf., 3, Liblice, Czech., 1964. pp 135. CAN64: 90519.
