The tetradymite group includes:
hedleyite: Bi7Te3
joséite-B: Bi4Te2S
kawazulite: Bi2Te2Se
paraguanajuatite: Bi2Se3
pilsenite: Bi4Te3
sulphotsumoite: Bi3Te2S
tellurantimony: Sb2Te3
tellurobismuthite: Bi2Te3
tetradymite: Bi2Te2S
tsumoite: BiTe
zipserite: Bi5S4
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