Basic Lead Bromides

When lead bromide is fused in moist air it is converted into a pearly yellow mass, which is said to be PbBr₂.PbO; the hydrated salt PbBr₂.PbO.H₂O is obtained when sodium bromide and lead acetate solutions are heated together, and also when lead bromide solution is treated with ammonia;

the compound PbBr₂.6PbO.2H₂O has also been obtained in white needles by the action of 0.05N KBr solution on lead hydroxide, whence 4PbBr₂.12PbO.3H₂O is formed in yellow microscopic needles by the action of caustic soda. The compound PbBr₂.2PbO is said also to exist.

Lead bromide forms with pyridine the compounds: PbBr₂.2C₅H₅N and PbBr₂.3C₅H₅N.