data_[Na12Sn4Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [13.3373]
_cell_length_b [5.3887]
_cell_length_c [9.6189]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Na3SnSb2]
_chemical_formula_sum '[Na12 Sn4 Sb8]'
_cell_volume [691.3185]
_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  0.0572  0.2500  0.4188  1
  Na  Na1  4  0.1603  0.7500  0.8527  1
  Na  Na2  4  0.2351  0.2500  0.6839  1
  Sn  Sn3  4  0.0924  0.2500  0.0723  1
  Sb  Sb4  4  0.0165  0.7500  0.1969  1
  Sb  Sb5  4  0.1938  0.7500  0.5024  1
]