data_[Na8Sr4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.3711]
_cell_length_b [10.9499]
_cell_length_c [5.6929]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.8617]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2SrO3]
_chemical_formula_sum '[Na8 Sr4 O12]'
_cell_volume [371.1156]
_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
[
  Na  Na0  4  0.0000  0.3472  0.0000  1
  Na  Na1  2  0.0000  0.0000  0.0000  1
  Na  Na2  2  0.0000  0.5000  0.5000  1
  Sr  Sr3  4  0.0000  0.1690  0.5000  1
  O  O4  8  0.2462  0.1681  0.2403  1
  O  O5  4  0.2475  0.0000  0.7321  1
]