data_global
_chemical_name_mineral 'Maghemite'
loop_
_publ_author_name
'Shin HS'
_journal_name_full 'Journal of the Korean Ceramic Society'
_journal_volume 35 
_journal_year 1998
_journal_page_first 1113
_journal_page_last 1119
_publ_section_title
;
 A study on the structure of maghemite (gamma-Fe2O3)
 I. Rietveld analysis of powder XRD patterns
;
_database_code_amcsd 0020518
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe2.645 O3.99'
_cell_length_a 8.3457
_cell_length_b 8.3457
_cell_length_c 8.3457
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 581.284
_exptl_crystal_density_diffrn      4.835
_symmetry_space_group_name_H-M 'P 43 3 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-z,1/2+x,1/2-y'
  '-y,1/2+z,1/2-x'
  '-x,1/2+y,1/2-z'
  '3/4-x,1/4+z,3/4+y'
  '3/4-z,1/4+y,3/4+x'
  '3/4-y,1/4+x,3/4+z'
  '1/4-x,1/4-z,1/4-y'
  '1/4-z,1/4-y,1/4-x'
  '1/4-y,1/4-x,1/4-z'
  '1/2-z,-x,1/2+y'
  '1/2-y,-z,1/2+x'
  '1/2-x,-y,1/2+z'
  '1/2+z,1/2-x,-y'
  '1/2+y,1/2-z,-x'
  '1/2+x,1/2-y,-z'
  '3/4+x,3/4-z,1/4+y'
  '3/4+z,3/4-y,1/4+x'
  '3/4+y,3/4-x,1/4+z'
  '1/4+x,3/4+z,3/4-y'
  '1/4+z,3/4+y,3/4-x'
  '1/4+y,3/4+x,3/4-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
_atom_site_U_iso_or_equiv
Fe1   0.62500   0.62500   0.62500   0.35000   0.00633
Fe2  -0.00440  -0.00440  -0.00440   1.00000   0.00899
Fe3   0.12500   0.36690  -0.11690   0.98000   0.00899
O1   0.38170   0.38170   0.38170   0.99000   0.00887
O2   0.38170   0.87360   0.88190   1.00000   0.01013