Structures are reported for two anionic antimony (III) bromide chlorides, Hpy [SbBr 2 Cl 2 ] and [Hpy] 4 [Sb 4 Br 1 2 Cl 8 ] , both of which are subject to halogen disorder. The first compound has an infinite chain structure in which antimony coordination is raised to six by the formation of double halogen bridges by atoms with high bromine content. The structure of the second compound is based on a distorted square of antimony atoms, again in distorted octahedral coordination. The antimony atoms are linked together by single bromine bridges and chlorine atoms or atoms with high chlorine content occupy the trans positions. The pattern of Sb-Br bridging distances suggests that the structure is derived by interconnection of two singly bridged [Sb 2 Br 5 Cl 4 ] 3 - units by two bridging Br - ions.