data_global
_chemical_name_mineral 'Bismite'
loop_
_publ_author_name
'Sillen L'
_journal_name_full 'Naturwissenschaften'
_journal_volume 28 
_journal_year 1940
_journal_page_first 206
_journal_page_last 207
_publ_section_title
;
 Die Kristallstruktur des monoklinen alpha-Bi2 O3
 _cod_database_code 1010004
;
_database_code_amcsd 0016940
_chemical_formula_sum 'Bi2 O3'
_cell_length_a 5.83
_cell_length_b 8.14
_cell_length_c 7.48
_cell_angle_alpha 90
_cell_angle_beta 67.07
_cell_angle_gamma 90
_cell_volume 326.923
_exptl_crystal_density_diffrn      9.467
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Bi1   0.52000   0.18750   0.63500
Bi2   0.04000   0.04300   0.22500
O1   0.61500   0.27800   0.31600
O2   0.63100   0.02700   0.11300
O3   0.02400   0.08400   0.46000