Cu Fe O6 Pb2 Sr2 Rouillon T, Caldes M, Genouel R, Michel C, Hervieu M, Raveau B Journal of Materials Chemistry 5 (1995) 1163-1170 An ordered oxygen deficient K2 Ni F4 structure: Pb2 Sr2 Cu Fe O6 _cod_database_code 1001712 _database_code_amcsd 0013077 5.4604 5.5227 12.2110 90 90 90 P2_1am atom x y z Cu1 .25 .25 0 Pb1 .25 .751 .1446 Sr1 .25 .256 .3570 Fe1 .25 .75 .5 O1 .164 .176 .148 O2 .25 .75 .333 O3 0 0 .5 O4 .5 .5 .5