硝酸镭是一种无机化合物,化学式为Ra(NO3)2,有强放射性。它是白色固体,但旧样本呈黄灰色。它的溶解度比硝酸钡低。[1][4]
硝酸镭通常用硝酸和金属镭、氢氧化镭或碳酸镭的反应制备:[3]
- Ra(OH)2 + 2 HNO3 → Ra(NO3)2 + 2 H2O
其单晶可以通过异丙醇挥发至硝酸镭水溶液中得到,但久置会因自身辐射而变黄。[2]
硝酸镭在820℃分解,生成氧化镭。是否经过亚硝酸镭(Ra(NO2)2)为中间产物仍属未知。[3]
Otto Erbacher. Löslichkeits-Bestimmungen einiger Radiumsalze [Solubility determinations of some radium salts]. Chemische Berichte. 1930, 63 (1): 141–156. doi:10.1002/cber.19300630120 (德语).
Zhuanling Bai, Jacob Brannon, Cristian Celis-Barros, Nicholas Beck, Joseph M. Sperling, Brian M. Rotermund, Daniela Gomez Martinez, Hannah B. Wineinger, and Thomas E. Albrecht-Schönzart. Radium Revisited: Revitalization of the Coordination Chemistry of Nature’s Largest +2 Cation. Inorg. Chem. 2023, 62, 22, 8478–8481. doi:10.1021/acs.inorgchem.3c01170.
Richard C. Ropp. Encyclopedia of the Alkaline Earth Compounds. Elsevier, 2013. pp 223. Radium Nitrate