AM_Tetradymite Formula: Te13 S8 Bi14 Name: Tetradymite Unit cell: 10.7 10.7 28.17 90.0 90.0 120.0 , V=2793.09 Space group: R11-3 (1)

Pauling L , American Mineralogist , 60 (1975) p.994-997, The formula, structure, and chemical bonding of tetradymite, Bi14Te13S8, and the, Phase Bi14Te15S6, cell parameters were computed from those provided in the rhombohedral setting