Tetradymite
Harker D
Zeitschrift fur Kristallographie 89 (1934) 175-181
The crystal structure of the mineral tetradymite, Bi2 Te2 S
_cod_database_code 1011150
_database_code_amcsd 0018035
10.31 10.31 10.31 24.17 24.17 24.17 R-3
atom    x    y    z
S1      0    0    0
Bi1  .392 .392 .392
Te1  .788 .788 .788