Cu6 Fe2 La4.4 O20 Sr3.6 Genouel R, Michel C, Nguyen N, Hervieu M, Raveau B Journal of Solid State Chemistry 115 (1995) 469-475 Ordered substitution of iron for copper in the tetragonal perovskite La6.4 Sr1.6 Cu8 O20 _cod_database_code 1001647 _database_code_amcsd 0013851 10.7807 10.7807 3.8987 90 90 90 P4/mbm atom x y z occ La1 .2567 .4723 .5 .55 Sr1 .2567 .4723 .5 .45 Fe1 0 0 0 Cu2 .5 0 0 Cu3 .2244 .7244 0 O1 0 0 .5 O2 .5 0 .5 O3 .211 .711 .5 O4 .383 .883 0 O5 .153 .094 0