data_[Na6Sr26]
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
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [9.3020]
_cell_length_b [13.2953]
_cell_length_c [13.3795]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Na3Sr13]
_chemical_formula_sum '[Na6 Sr26]'
_cell_volume [1654.6873]
_cell_formula_units_Z [2]
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  0.2515  0.0000  0.9962  1
  Na  Na1  2  0.0000  0.0000  0.7651  1
  Sr  Sr2  8  0.2442  0.2439  0.7485  1
  Sr  Sr3  4  0.0000  0.2322  0.9977  1
  Sr  Sr4  4  0.2411  0.0000  0.5059  1
  Sr  Sr5  4  0.5000  0.2415  0.9989  1
  Sr  Sr6  2  0.0000  0.0000  0.2397  1
  Sr  Sr7  2  0.5000  0.0000  0.2422  1
  Sr  Sr8  2  0.5000  0.0000  0.7614  1
]