Cu6 Fe2 La4.4 O20 Sr3.6 Genouel R, Michel C, Raveau B Chemistry of Materials 7 (1995) 2181-2184 Powder neutron diffraction study of the ordered oxygen-deficient perovskites (La, Sr)8 Cu8-x Fex O20 _cod_database_code 1001701 _database_code_amcsd 0012207 10.7480 10.7480 3.8976 90 90 90 P4/mbm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) La1 .2571 .4726 .5 .55 Sr1 .2571 .4726 .5 .45 Cu1 0 0 0 .14 Fe1 0 0 0 .86 Cu2 .5 0 0 Cu3 .2251 .7251 0 .93 Fe2 .2251 .7251 0 .07 O1 0 0 .5 O2 .5 0 .5 .0150 .0150 .0117 .0061 0 0 O3 .2202 .7202 .5 .0084 .0084 .0011 .006 0 0 O4 .3768 .8768 0 O5 .1569 .0962 0