Ba2 Cu3 La O6.7 Hervieu M, Nguyen N, Michel C, Deslandes F, Raveau B Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences 305 (1987) 1063-1068 A preliminary X-ray diffraction study of the tetragonal superconducting oxide La Ba2 Cu3 O7-d _cod_database_code 1001677 _database_code_amcsd 0012300 3.895 3.895 11.727 90 90 90 P4/mmm atom x y z occ La1 .5 .5 .5 Ba1 .5 .5 .1846 Cu1 0 0 0 Cu2 0 0 .3521 O1 0 0 .1720 .325 O2 0 .5 .3849 O3 .5 0 0