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 0020519
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Fe1.966 O2.962'
_cell_length_a 8.346
_cell_length_b 8.346
_cell_length_c 25.034
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1743.761
_exptl_crystal_density_diffrn      4.791
_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   0.12110   0.12110   0.00000   1.00000   0.00722
Fe2   0.61770   0.61770   0.00000   0.97000   0.01013
Fe3   0.99030   0.74480   0.04010   0.98000   0.00760
Fe4   0.49860   0.24220   0.04270   0.98000   0.00849
Fe5   0.75270   0.49390   0.12420   0.99000   0.01026
Fe6   0.36740   0.86150   0.00280   0.99000   0.00760
Fe7   0.12880   0.38180   0.08230   0.98000   0.01026
Fe8   0.87770   0.11030   0.08570   0.99000   0.01013
Fe9   0.62160   0.86110   0.08600   0.97000   0.01026
O1   0.11140   0.38140  -0.00240   0.99000   0.00747
O2   0.85740   0.12760  -0.00040   0.98000   0.00735
O3   0.62940   0.35740   0.00050   1.00000   0.00747
O4   0.60440   0.85770   0.00430   0.96000   0.00760
O5   0.36460   0.87160   0.07900   1.00000   0.00747
O6   0.61790   0.62910   0.08010   0.99000   0.00760
O7   0.87240   0.87090   0.08320   0.99000   0.00735
O8   0.35100   0.39810   0.08330   1.00000   0.00760
O9   0.88040   0.37700   0.08530   1.00000   0.00747
O10   0.10540   0.15380   0.08530   0.99000   0.00747
O11   0.10880   0.61670   0.08630   1.00000   0.00747
O12   0.63940   0.10900   0.08770   0.95000   0.01013