data_[Na8Sr8]
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 [P2_12_12_1]
_cell_length_a [7.0765]
_cell_length_b [7.3715]
_cell_length_c [14.2773]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [19]
_chemical_formula_structural [NaSr]
_chemical_formula_sum '[Na8 Sr8]'
_cell_volume [744.7709]
_cell_formula_units_Z [8]
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  0.1276  0.8746  0.2752  1.0
  Na  Na1  4  0.1549  0.6100  0.0757  1.0
  Sr  Sr2  4  0.1276  0.6223  0.8083  1.0
  Sr  Sr3  4  0.1311  0.0999  0.0156  1.0
]