Ba2 Cu3 O6.877 Y Sullivan J, Bordet P, Marezio M, Takenaka K, Uchida S Physical Review B48 (1993) 10638-10641 Electron-density Fourier maps of an untwinned YBa2Cu3O6.877 single crystal by x-ray-diffraction data _cod_database_code 1008649 _database_code_amcsd 0016537 3.8184 3.8857 11.701 90 90 90 Pmmm atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Y1 .5 .5 .5 .00479 .00526 .00610 0 0 0 Ba1 .5 .5 .185580 .00879 .00744 .00889 0 0 0 Cu1 0 0 0 .00818 .00751 .00554 0 0 0 Cu2 0 0 .35588 .00454 .00493 .00929 0 0 0 O1 0 0 .1580 .0121 .0131 .0082 0 0 0 O2 .5 0 .37877 .0051 .0082 .0125 0 0 0 O3 0 .5 .37792 .0074 .0053 .0101 0 0 0 O4 0 .5 0 .877 .027 .0105 .0131 0 0 0