data_[Na2Ga8Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ga  1.8100  1.3000  0.7600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P4_2/nmc]
_cell_length_a [6.3238]
_cell_length_b [6.3238]
_cell_length_c [11.5436]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [137]
_chemical_formula_structural [Na(GaSn)4]
_chemical_formula_sum '[Na2 Ga8 Sn8]'
_cell_volume [461.6319]
_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  2  0.0000  0.0000  0.0000  1.0
  Ga  Ga1  8  0.0000  0.2920  0.5458  1.0
  Sn  Sn2  8  0.0000  0.2487  0.2897  1.0
]