Double Salts of Lead Bromide

Lead bromide forms a number of double salts with the bromides of more electropositive metals, and combines also with hydrobromic acid to form the crystalline complex acid 2HBr.5PbBr₂.10H₂O. The following salts have been described:

PbBr₂.2KBr; PbBr₂.2NH₄Br.H₂O; PbBr₂.2RbBr.H₂O; PbBr₂.2KBr.H₂O; 2PbBr₂.NH₄Br; and 2PbBr₂.RbBr; 3PbBr₂.3KBr.H₂O (?); NH₄Pb₂Cl₄Br; PbBr₂.4CsBr; PbBr₂.KBr.H₂O; (NH₄)₂PbBr₂Cl₂.4H₂O; PbBr₂.CsBr; 2PbBr₂.KBr; and NH₄Pb₂Br₄Cl; 2PbBr₂.CsBr; PbBr₂.2MgBr₂.6H₂O;

Compounds of lead chloride and bromide have been described: PbCl₂.PbBr₂ and 3PbCl₂.PbBr₂, but these may be isomorphous mixtures of the two salts.