data_global _amcsd_formula_title 'Bi2Sr2CaCu2O8' loop_ _publ_author_name 'Hervieu M' 'Michel C' 'Domenges B' 'Laligant Y' 'Lebail A' 'Ferey G' 'Raveau B' _journal_name_full 'Modern Physics Letters' _journal_volume B2 _journal_year 1988 _journal_page_first 491 _journal_page_last 500 _publ_section_title ; Electron microscopy study of the superconductor "Bi2Sr2CaCu2O8" _cod_database_code 1000285 ; _database_code_amcsd 0014652 _chemical_formula_sum 'Bi2 Sr2 Cu2 Ca O8' _cell_length_a 5.4054 _cell_length_b 5.4016 _cell_length_c 30.7152 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 896.816 _exptl_crystal_density_diffrn 6.580 _symmetry_space_group_name_H-M 'A m a a' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,y,-z' '1/2+x,1/2+y,1/2-z' '1/2-x,-y,z' '1/2-x,1/2-y,1/2+z' '1/2+x,-y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,y,-z' '1/2-x,1/2+y,1/2-z' '-x,y,z' '-x,1/2+y,1/2+z' 'x,-y,-z' 'x,1/2-y,1/2-z' '-x,-y,-z' '-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Bi1 0.05200 0.27450 0.05240 0.50000 Sr1 0.00000 0.75000 0.35970 1.00000 Cu1 0.50000 0.75000 0.30330 1.00000 Ca1 0.50000 0.25000 0.25000 1.00000 O1 0.75000 0.00000 0.20100 1.00000 O2 0.25000 0.50000 0.20100 1.00000 O3 0.00000 0.25000 0.38500 1.00000 O4 0.50000 0.27000 0.05240 1.00000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Bi1 0.05400 0.00800 0.03300 0.00000 0.00000 0.00000 Sr1 0.09500 0.01000 0.06800 0.00000 0.00000 0.00000 Ca1 0.09900 0.03000 0.15800 0.00000 0.00000 0.00000