data_global
_chemical_name_mineral 'Chapmanite'
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
 Note: z(O3) corrected
;
_database_code_amcsd 0015577
_chemical_compound_source 'Smilokov, Czechoslovakia'
_chemical_formula_sum 'Sb Fe2 Si2 O9 H'
_cell_length_a 5.19
_cell_length_b 8.99
_cell_length_c 7.70
_cell_angle_alpha 90
_cell_angle_beta 100.67
_cell_angle_gamma 90
_cell_volume 353.056
_exptl_crystal_density_diffrn      4.088
_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
Sb   0.41800   0.50000   0.74300
Fe   0.50000   0.16550   0.00000
Si   0.30100   0.17100   0.36500
O1   0.28900   0.33200  -0.13500
O2   0.29600   0.00000  -0.13500
O3   0.22000   0.17300   0.14300
O-H   0.68400   0.00000   0.14400
O4   0.08200   0.25400   0.44600
O5   0.33600   0.00000   0.44300