data_[Sr8Sm8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Sm  1.1700  1.8500  1.2290
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [12.2695]
_cell_length_b [6.6606]
_cell_length_c [6.6832]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [Sr2Sm2O5]
_chemical_formula_sum '[Sr8 Sm8 O20]'
_cell_volume [546.1624]
_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  0.2046  0.0000  0.0000  1.0
  Sm  Sm1  8  0.0000  0.1681  0.6681  1.0
  O  O2  16  0.1262  0.1556  0.3485  1.0
  O  O3  4  0.0000  0.0000  0.0000  1.0
]