Ba2 Cu3 O7.5 Pr Amador U, Moran E, Alario-Franco M, Ibanez J, Martin J, Rey T Solid State Ionics 63 (1993) 858-865 On the oxidation-reduction of Ba2PrCu3Oy single crystals _cod_database_code 1008640 _database_code_amcsd 0016529 3.9048 3.9048 11.648 90 90 90 P4/mmm atom x y z occ Cu1 0 0 0 Cu2 0 0 .343 Pr1 .5 .5 .5 Ba1 0 0 .172 O1 0 0 .141 O2 0 .5 .382 O3 0 .5 0 .75