data_[Sr8Fe8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Fe  1.8300  1.4000  0.8525
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [15.7303]
_cell_length_b [5.7783]
_cell_length_c [5.6017]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Sr2Fe2O5]
_chemical_formula_sum '[Sr8 Fe8 O20]'
_cell_volume [509.1589]
_cell_formula_units_Z [4]
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
[
  Sr  Sr0  8  0.1084  0.0197  0.5041  1.0
  Fe  Fe1  4  0.0000  0.0000  0.9990  1.0
  Fe  Fe2  4  0.2500  0.5719  0.5433  1.0
  O  O3  8  0.0081  0.7474  0.7504  1.0
  O  O4  8  0.1402  0.0490  0.9841  1.0
  O  O5  4  0.2500  0.6289  0.8873  1.0
]