Ba1.04 Ca0.78 Cu2 O7 Sr0.96 Tl1.22 Labbe P, Ledesert M, Maignan A, Martin C, Leligny H, Raveau B Acta Crystallographica B51 (1995) 18-22 Single crystal study of the 'BaSr' 1212 superconductor Tl1+xBaSrCa1-xCu2O7-d _cod_database_code 1001658 _database_code_amcsd 0009885 3.8356 3.8356 12.390 90 90 90 P4/mmm atom x y z occ Tl1 .0949 0 0 .25 Ca1 .5 .5 .5 .78 Tl2 .5 .5 .5 .22 Ba1 .5 .5 .21615 .52 Sr1 .5 .5 .21615 .48 Cu1 0 0 .3698 O1 .5 0 .3744 O2 0 0 .1621 O3 .5 .5 0