data_[Sr4Fe4O8]
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 [Pnma]
_cell_length_a [5.7542]
_cell_length_b [3.4838]
_cell_length_c [11.2148]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [SrFeO2]
_chemical_formula_sum '[Sr4 Fe4 O8]'
_cell_volume [224.8187]
_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  4  0.0776  0.7500  0.8614  1.0
  Fe  Fe1  4  0.0629  0.2500  0.6113  1.0
  O  O2  4  0.1810  0.7500  0.2390  1.0
  O  O3  4  0.2190  0.7500  0.5029  1.0
]