data_global _amcsd_formula_title 'Bi K0.56 O3 Sr0.44' loop_ _publ_author_name 'Kazakov S' 'Chaillout C' 'Bordet P' 'Capponi J' 'Nunez-Regueiro M' 'Rysak A' 'Tholence J' 'Radaelli P' 'Putilin S' 'Antipov E' _journal_name_full 'Nature' _journal_volume 390 _journal_year 1997 _journal_page_first 148 _journal_page_last 150 _publ_section_title ; Discovery of a second family of bismuth-oxide-based superconductors _cod_database_code 1008816 ; _database_code_amcsd 0016686 _chemical_formula_sum '(Sr.44 K.56) Bi O3' _cell_length_a 5.9416 _cell_length_b 5.9416 _cell_length_c 8.4394 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 297.933 _exptl_crystal_density_diffrn 7.077 _symmetry_space_group_name_H-M 'I 4/m c m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '-y,-x,1/2+z' '1/2-y,1/2-x,+z' 'y,x,1/2-z' '1/2+y,1/2+x,-z' 'y,-x,-z' '1/2+y,1/2-x,1/2-z' '-y,x,z' '1/2-y,1/2+x,1/2+z' 'x,-y,1/2+z' '1/2+x,1/2-y,+z' '-x,y,1/2-z' '1/2-x,1/2+y,-z' 'x,y,-z' '1/2+x,1/2+y,1/2-z' '-x,-y,z' '1/2-x,1/2-y,1/2+z' 'y,x,1/2+z' '1/2+y,1/2+x,+z' '-y,-x,1/2-z' '1/2-y,1/2-x,-z' '-y,x,-z' '1/2-y,1/2+x,1/2-z' 'y,-x,z' '1/2+y,1/2-x,1/2+z' '-x,y,1/2+z' '1/2-x,1/2+y,+z' 'x,-y,1/2-z' '1/2+x,1/2-y,-z' '-x,-y,-z' '1/2-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 Sr1 0.00000 0.50000 0.75000 0.44000 K1 0.00000 0.50000 0.75000 0.56000 Bi1 0.00000 0.00000 0.00000 1.00000 O1 0.00000 0.00000 0.25000 1.00000 O2 0.22190 0.72190 0.00000 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 O1 0.03300 0.03300 0.00900 0.00000 0.00000 0.00000 O2 0.01100 0.01100 0.06000 0.00000 0.00000 0.00000