data_global
_chemical_name_mineral 'Beyerite'
loop_
_publ_author_name
'Grice J D'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 40 
_journal_year 2002
_journal_page_first 693
_journal_page_last 698
_publ_section_title
;
 A solution to the crystal structures of bismutite and beyerite
;
_database_code_amcsd 0005771
_chemical_formula_sum 'Bi2 Ca C2 O8'
_cell_length_a 3.7729
_cell_length_b 3.7742
_cell_length_c 21.726
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 309.371
_exptl_crystal_density_diffrn      6.549
_symmetry_space_group_name_H-M 'I m m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '-x,-y,-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   0.00000   0.00000  -0.30915   0.01051
Ca   0.00000   0.00000   0.50000   0.01090
C   0.50000   0.50000   0.41070   0.01400
O1   0.50000   0.00000   0.25580   0.00500
O2   0.50000   0.20700   0.43790   0.01580
O3   0.50000   0.50000   0.34980   0.02000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Bi 0.01110 0.01140 0.00910 0.00000 0.00000 0.00000
Ca 0.01110 0.01000 0.01190 0.00000 0.00000 0.00000
C 0.01200 0.02600 0.00400 0.00000 0.00000 0.00000
O1 0.00600 0.00700 0.00000 0.00000 0.00000 0.00000
O2 0.01400 0.01500 0.01800 0.00000 0.00000 0.00700
O3 0.03100 0.02400 0.00400 0.00000 0.00000 0.00000