Ba2 Cu3 O6.072 Y Santoro A, Miraglia S, Beech F, Sunshine S, Murphy D, Schneemeyer L, Waszcak J Materials Research Bulletin 22 (1987) 1007-1013 The structure and properties of Ba2 Y Cu3 O6 _cod_database_code 1008706 _database_code_amcsd 0016592 3.8570 3.8570 11.8194 90 90 90 P4/mmm atom x y z occ Ba1 .5 .5 .1952 Y1 .5 .5 .5 Cu1 0 0 0 Cu2 0 0 .3607 O1 0 0 .1518 .990 O2 0 .5 .3791 1.009 O3 0 .5 0 .028