data_[Sr8Ti4Al4Cu8O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ti  1.5400  1.4000  0.8517
  Al  1.6100  1.2500  0.6750
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [22.3323]
_cell_length_b [6.1372]
_cell_length_c [5.4414]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Sr2TiAlCu2O7]
_chemical_formula_sum '[Sr8 Ti4 Al4 Cu8 O28]'
_cell_volume [745.7790]
_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  0.1412  0.5565  0.9800  1
  Ti  Ti1  4  0.2500  0.0827  0.9503  1
  Al  Al2  4  0.0000  0.0000  0.5421  1
  Cu  Cu3  8  0.0551  0.0426  0.0196  1
  O  O4  8  0.0543  0.1442  0.3501  1
  O  O5  8  0.0568  0.6334  0.2337  1
  O  O6  8  0.1837  0.5620  0.5261  1
  O  O7  4  0.2500  0.1372  0.6047  1
]