Ba2.1 Cu3 O6 Y0.9 Bordet P, Chaillout C, Capponi J, Chenavas J, Marezio M Nature 327 (1987) 687-689 Crystal structure of Y0.9 Ba2.1 Cu3 O6, a compound related to the high-Tc superconductor Y Ba2 Cu3 O7. _cod_database_code 1008355 _database_code_amcsd 0016266 3.8715 3.8715 11.738 90 90 90 P4/mmm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ba1 .5 .5 .1921 .0105 .0105 .0148 0 0 0 Y1 .5 .5 .5 .89 .0051 .0051 .0111 0 0 0 Ba2 .5 .5 .5 .11 .0051 .0051 .0111 0 0 0 Cu1 0 0 0 .0193 .0193 .017 0 0 0 Cu2 0 0 .3605 .0029 .0029 .0129 0 0 0 O1 0 0 .154 .018 .018 .010 0 0 0 O2 .5 0 .3794 .003 .009 .015 0 0 0