Cu La0.6 O5 Sr1.4 Tl Huve M, Michel C, Martin C, Hervieu M, Maignan A, Provost J, Raveau B Physica C 179 (1991) 214-226 The "1201"-phase of the "Tl-Sr-La-Cu-O" system. Homogeneity range, structure and superconductivity _cod_database_code 1001488 _database_code_amcsd 0015027 3.7535 3.7535 8.9038 90 90 90 P4/mmm atom x y z occ Tl1 0 0 .5 Sr1 .5 .5 .2061 .7 La1 .5 .5 .2061 .3 Cu1 0 0 0 O1 0 0 .259 O2 .5 .5 .5 O3 .5 0 0