data_[Sr8Fe4Cu8O28]
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
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [25.3419]
_cell_length_b [5.1716]
_cell_length_c [5.1310]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Sr2FeCu2O7]
_chemical_formula_sum '[Sr8 Fe4 Cu8 O28]'
_cell_volume [672.4532]
_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  0.1488  0.0032  0.9776  1
  Fe  Fe1  4  0.2500  0.5656  0.0275  1
  Cu  Cu2  8  0.0597  0.5013  0.9782  1
  O  O3  8  0.0755  0.2490  0.7289  1
  O  O4  8  0.0763  0.7498  0.7279  1
  O  O5  8  0.1806  0.0151  0.4708  1
  O  O6  4  0.2500  0.5859  0.4040  1
]