Radium nitrate is a radioactive salt with the formula Ra(NO<sub>3</sub>)<sub>2</sub>. 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. It decomposes at 280 ðC to radium oxide.
Radium nitrate is produced by the reaction of radium carbonate or radium sulfate with nitric acid: