Tetradymite Harker D Zeitschrift fur Kristallographie 89 (1934) 175-181 The crystal structure of the mineral tetradymite, Bi2Te2S Locality: Hungary _database_code_amcsd 0010544 10.33 10.33 10.33 24.17 24.17 24.17 R-3 atom x y z Bi .392 .392 .392 Te .788 .788 .788 S 0 0 0