data_global _amcsd_formula_title 'PbFBr' loop_ _publ_author_name 'Bannister F A' _journal_name_full 'Mineralogical Magazine' _journal_volume 24 _journal_year 1935 _journal_page_first 49 _journal_page_last 58 _publ_section_title ; The crystal-structure of the bismuth oxyhalides ; _database_code_amcsd 0014438 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Pb F Br' _cell_length_a 4.18 _cell_length_b 4.18 _cell_length_c 7.59 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 132.616 _exptl_crystal_density_diffrn 7.666 _symmetry_space_group_name_H-M 'P 4/n m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,z' 'y,x,-z' 'y,-x,-z' '1/2-y,1/2+x,z' 'x,-y,z' '1/2-x,1/2+y,-z' '1/2+x,1/2+y,-z' '-x,-y,z' '1/2+y,1/2+x,z' '-y,-x,-z' '-y,x,-z' '1/2+y,1/2-x,z' '-x,y,z' '1/2+x,1/2-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 Pb 0.00000 0.50000 0.19500 F 0.00000 0.00000 0.00000 Br 0.00000 0.50000 0.65000