data_[Na4Sr4Sn4]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.7094]
_cell_length_b [18.4905]
_cell_length_c [5.7331]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [NaSrSn]
_chemical_formula_sum '[Na4 Sr4 Sn4]'
_cell_volume [393.2300]
_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  2  0.0000  0.0000  0.9048  1.0
  Na  Na1  2  0.5000  0.0000  0.3896  1.0
  Sr  Sr2  4  0.5000  0.1823  0.8249  1.0
  Sn  Sn3  4  0.0000  0.1437  0.3239  1.0
]