data_global _chemical_name_mineral 'Sphaerobismoite' loop_ _publ_author_name 'Blower S K' 'Greaves C' _journal_name_full 'Acta Crystallographica, Section C' _journal_volume 44 _journal_year 1988 _journal_page_first 587 _journal_page_last 589 _publ_section_title ; The structure of beta-Bi2O3 from powder neutron diffraction data ; _database_code_amcsd 0010069 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Bi2 O3' _cell_length_a 7.739 _cell_length_b 7.739 _cell_length_c 5.636 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 337.552 _exptl_crystal_density_diffrn 9.169 _symmetry_space_group_name_H-M 'P -4 21 c' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,1/2+z' 'y,-x,-z' '1/2-x,1/2+y,1/2-z' '-x,-y,z' '1/2+y,1/2+x,1/2+z' '-y,x,-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_U_iso_or_equiv Bi 0.01740 0.25450 0.23850 0.01406 O1 0.29050 0.31250 0.02860 0.02166 O2 0.00000 0.50000 0.39390 0.01608