data_global
_chemical_name_mineral 'Laihunite'
loop_
_publ_author_name
'Ferrifayalite Research Group'
_journal_name_full 'Acta Geologica Sinica'
_journal_volume 50 
_journal_year 1976
_journal_page_first 161
_journal_page_last 175
_publ_section_title
;
 Ferrifayalite and its crystal structure
 Note: Reported SiO bond lengths of 1.9 could not be reproduced
;
_database_code_amcsd 0011976
_chemical_compound_source 'Liaoning Province, China'
_chemical_formula_sum 'Fe5 Si4 O16'
_cell_length_a 4.808
_cell_length_b 10.171
_cell_length_c 5.824
_cell_angle_alpha 90.0
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 284.806
_exptl_crystal_density_diffrn      7.551
_symmetry_space_group_name_H-M 'P 21/b 1 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Fe1   0.00000   0.00000   0.00000
Fe2   0.50900   0.22700   0.27300
Fe3   0.00900   0.27300   0.72700
Si1   0.58400   0.09900   0.77800
Si2   0.08400   0.40100   0.22200
O1   0.25800   0.09600   0.78900
O2   0.72900   0.16600   0.50900
O3   0.74200   0.17500   0.03900
O4   0.83000   0.45300   0.76600
O5   0.24200   0.32500   0.96100
O6   0.22900   0.33400   0.49100
O7   0.33000   0.04700   0.23400
O8   0.75800   0.40400   0.21100