Lead Diuranate, PbU₂O₇

Lead Diuranate, PbU₂O₇, is said to be formed when uranyl acetate solution is digested with freshly precipitated lead carbonate; when ammonia is added to a mixture of uranyl and lead nitrate solutions, and when lead acetate and uranyl nitrate solutions are mixed together. It is described as a yellowish red precipitate, soluble in acetic acid, which turns brown on heating, and when reduced in hydrogen yields pyrophoric lead and uranous oxide, UO₂.

The following salts have been obtained by Zehenter:

Pb(C₂H₃O₂)₂.UO₂(C₂H₃O₅)₂.3H₂O,

which on ignition yields PbUO₄ as a reddish brown crystalline mass;

2PbU₂O₇.5H₂O, Pb₅U₉O₃₂.10H₂O, Pb₄U₅O₁₉.4H₂O;

also [Pb(C₂H₃O₂)₂.3UO₃. 2H₂O]₃H₂O, which yields PbU₃O₁₀ on ignition.