Ba2 Cu3 Er O6.99 Torardi C, McCarron E, Subramanian M, Horowitz H, Michel J, Sleight A, Cox D American Chemical Society: Symposium Series 351 (1987) 152-163 Structure-Property Relationships for RBa2Cu3Ox Phases _cod_database_code 1001436 _database_code_amcsd 0011988 3.8123 3.8756 11.6576 90 90 90 Pmmm atom x y z occ Ba1 .5 .5 .1838 Er1 .5 .5 .5 Cu1 0 0 0 Cu2 0 0 .3563 O1 0 0 .1596 O2 0 .5 .3790 O3 .5 0 .3791 O4 0 .5 0 .89 O5 .5 0 0 .10