data_global
_chemical_name_mineral 'Maghemite'
loop_
_publ_author_name
'Sinha K P'
'Sinha A P B'
_journal_name_full 'Zeitschrift fur Anorganische und Allgemeine Chemie'
_journal_volume 293 
_journal_year 1957
_journal_page_first 228
_journal_page_last 232
_publ_section_title
;
 Ein Fehlstellenuberstruktur - Modell fur gamma-Fe2O3
;
_database_code_amcsd 0020515
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe21 O33 H'
_cell_length_a 8.35
_cell_length_b 8.35
_cell_length_c 8.35
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 582.183
_exptl_crystal_density_diffrn      4.854
_symmetry_space_group_name_H-M 'P -4 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-z,x,-y'
  '-y,z,-x'
  '-x,y,-z'
  'x,-z,-y'
  'z,-y,-x'
  'y,-x,-z'
  'x,z,y'
  'z,y,x'
  'y,x,z'
  '-z,-x,y'
  '-y,-z,x'
  '-x,-y,z'
  'z,-x,-y'
  'y,-z,-x'
  'x,-y,-z'
  '-x,z,-y'
  '-z,y,-x'
  '-y,x,-z'
  '-x,-z,y'
  '-z,-y,x'
  '-y,-x,z'
  'z,x,y'
  'y,z,x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Fe1   0.00000   0.00000   0.00000   1.00000
Fe2   0.50000   0.50000   0.50000   1.00000
Fe3   0.00000   0.50000   0.50000   1.00000
Fe4   0.25000   0.25000   0.25000   1.00000
Fe5   0.12500   0.12500   0.62500   1.00000
O1   0.37500   0.37500   0.37500   1.00000
O2   0.87500   0.87500   0.87500   1.00000
O3   0.87500   0.87500   0.37500   1.00000
O4   0.37500   0.37500   0.87500   1.00000
O-H1   0.62500   0.62500   0.62500   0.25000