Bi1.5 Cu2 O11 Pb0.5 Sr3.5 Pelloquin D, Caldes M, Michel C, Maignan A, Hervieu M, Raveau B Physica C 217 (1993) 27-33 Lead substitution in the 30K-superconductor Bi2Sr4-yCu2CO3O8-d _cod_database_code 1001577 _database_code_amcsd 0015059 5.468 5.427 39.530 90 90 90 Abmm atom x y z occ Bi1 .25 0 .0383 .75 Pb1 .25 0 .0383 .25 Sr1 .75 0 .1073 .75 Sr2 .75 0 .1970 Cu1 .25 0 .1546 C1 .25 0 .25 O1 .669 0 .0377 O2 .196 0 .0933 O3 .168 0 .2184 O4 0 .25 .1539 O5 .5 .25 .1539 O6 0 0 .25 .5 O7 .5 0 .25 .5