data_global
_chemical_name_mineral 'Maghemite'
loop_
_publ_author_name
'Greaves C'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 49 
_journal_year 1983
_journal_page_first 325
_journal_page_last 333
_publ_section_title
;
 A powder neutron diffraction investigation of vacancy
 ordering and covalence in gamma-Fe2O3
 Sample: T = 4 K
;
_database_code_amcsd 0013508
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe2.667 O4'
_cell_length_a 8.3396
_cell_length_b 8.3396
_cell_length_c 8.3220
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 578.786
_exptl_crystal_density_diffrn      4.887
_symmetry_space_group_name_H-M 'P 43 21 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'y,x,-z'
  '1/2-y,1/2+x,3/4+z'
  '1/2-x,1/2+y,3/4-z'
  '-x,-y,1/2+z'
  '-y,-x,1/2-z'
  '1/2+y,1/2-x,1/4+z'
  '1/2+x,1/2-y,1/4-z'
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   0.74400   0.99600   0.12000   1.00000   0.00127
Fe2   0.62000   0.62000   0.00000   1.00000   0.00127
Fe3   0.36400   0.86700  -0.01600   1.00000   0.00127
Fe4   0.14000   0.14000   0.00000   0.33300   0.00127
O1   0.61500   0.86900  -0.01400   1.00000   0.00127
O2   0.11900   0.37700  -0.00500   1.00000   0.00127
O3   0.13700   0.86100   0.00700   1.00000   0.00127
O4   0.38300   0.63100  -0.00300   1.00000   0.00127