Se2 Tl2 Ketelaar J, t'Hart W, Polder D Zeitschrift fur Kristallographie 101 (1939) 396-405 The Crystal Structure of Tl Se, Thallous Thallic or Thallosic Selenide _cod_database_code 1010454 _database_code_amcsd 0017374 8.02 8.02 7.00 90 90 90 I4/mcm atom x y z Tl1 0 0 .25 Tl2 0 .5 .25 Se1 .179 .679 0