data_global _chemical_name_mineral 'Bismutoferrite' loop_ _publ_author_name 'Zhukhlistov A P' 'Zvyagin B B' _journal_name_full 'Soviet Physics Crystallography' _journal_volume 22 _journal_year 1977 _journal_page_first 419 _journal_page_last 423 _publ_section_title ; Determination of the crystal structures of chapmanite and bismuthoferrite by high-voltage electron diffraction ; _database_code_amcsd 0015576 _chemical_compound_source 'Schneeberg, Saxony, Germany' _chemical_formula_sum 'Bi Fe2 Si2 O9 H' _cell_length_a 5.21 _cell_length_b 9.02 _cell_length_c 7.74 _cell_angle_alpha 90 _cell_angle_beta 100.667 _cell_angle_gamma 90 _cell_volume 357.450 _exptl_crystal_density_diffrn 4.849 _symmetry_space_group_name_H-M 'C 1 m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Bi 0.41300 0.50000 0.71600 Fe 0.50000 0.16500 0.00000 Si 0.31600 0.16600 0.36900 O1 0.29500 0.32800 -0.14400 O2 0.31700 0.00000 -0.12800 O3 0.21900 0.17000 0.14300 O-H 0.68400 0.00000 0.14500 O4 0.08100 0.24800 0.44800 O5 0.32600 0.00000 0.42900