Ba2 Cu4 O8.06 Y Karpinski J, Kaldis E, Rusiecki S, Jilek E, Fischer P, Bordet P, Chaillout C, Chenavas J, Hodeau J, Marezio M Journal of the Less-Common Metals 150 (1989) 129-137 Two New Bulk Superconducting Phases in the Y-Ba-Cu-O System: Y Ba2 Cu3.5 O7+x (Tc 40K) and Y Ba2 Cu4 O8+x (Tc 80K) _cod_database_code 1008448 _database_code_amcsd 0016353 3.8415 3.8707 27.240 90 90 90 Ammm atom x y z occ Y1 .5 .5 0 Ba1 .5 .5 .1356 Cu1 0 0 .2127 Cu2 0 0 .0614 O1 0 0 .1454 O2 .5 0 .0524 O3 0 .5 .0528 O4 0 .5 .2187 .996 O5 .5 0 .254 .032