Radium azide is an inorganic compound of radium and nitrogen with the chemical formula Ra(N3)2.

[1] Radium azide can be prepared by dissolving radium carbonate in aqueous hydrazoic acid and evaporating the resulting solution.

[2][3] Radium azide forms a white crystalline solid.

[2] The compound decomposes when heated to 180–250 °C:[4][5]