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 1001711 _database_code_amcsd 0013076 5.4606 5.5228 12.2112 90 90 90 P2an atom x y z Cu1 0 0 0 Pb1 0 .506 .1445 Sr1 0 -.002 .3567 Fe1 .5 0 .5 O1 .108 -.090 .145 O2 0 .5 .332 O3 .25 .25 .5