The crystal structure of the selenide-based synthetic sulfosalt CuPbSb(3)Se(6)

Single crystals of copper lead tri­anti­mony hexa­selenide, CuPbSb(3)Se(6), were obtained as a minor phase during systematic studies of the formation conditions of selenide-based sulfosalts. The crystal structure is an unusual representative of the family of sulfosalts. Instead of the expected galena-like slabs with octa­hedral coordination, it features mono and double-capped trigonal–prismatic (Pb), square-pyramidal (Sb) and trigonal–bipyramidal (Cu) coordination. All metal positions are occupationally and/or positionally disordered.