data_global _amcsd_formula_title 'Bi4O7' loop_ _publ_author_name 'Dinnebier R E' 'Ibberson R M' 'Ehrenberg H' 'Jansen M' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 163 _journal_year 2002 _journal_page_first 332 _journal_page_last 339 _publ_section_title ; The crystal structures of the binary valence compound Bi3BiO7 and isotypic Bi3SbO7 as determined by high resolution X-ray and neutron powder diffraction ; _database_code_amcsd 0014020 _chemical_formula_sum 'Bi4 O7' _cell_length_a 6.7253 _cell_length_b 6.9950 _cell_length_c 7.7961 _cell_angle_alpha 72.566 _cell_angle_beta 88.842 _cell_angle_gamma 76.925 _cell_volume 340.390 _exptl_crystal_density_diffrn 9.249 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Bi1+3 0.72930 0.48500 0.62530 0.01300 Bi2+3 0.26150 0.49300 -0.12130 0.01000 Bi3+5 0.00000 0.00000 0.00000 0.00700 Bi4+3 0.48480 0.00420 0.25690 0.01300 Bi5+5 0.00000 0.00000 0.50000 0.01000 O1 0.10800 0.68400 0.04000 0.01300 O2 0.89100 0.32100 0.36400 0.01000 O3 0.10500 -0.08700 0.27400 0.00800 O4 0.52500 0.65700 0.37200 ? O5 0.28700 0.07000 0.52100 0.01700 O6 0.28500 0.04000 -0.05700 0.01400 O7 0.47200 0.36500 0.19500 0.00800