data_[Na12Sn2Sb8]
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 [P6_3mc]
_cell_length_a [10.6836]
_cell_length_b [10.6836]
_cell_length_c [6.9069]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [186]
_chemical_formula_structural [Na6SnSb4]
_chemical_formula_sum '[Na12 Sn2 Sb8]'
_cell_volume [682.7313]
_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  6  0.0193  0.5096  0.1424  1
  Na  Na1  6  0.1567  0.3134  0.4003  1
  Sn  Sn2  2  0.3333  0.6667  0.7900  1
  Sb  Sb3  6  0.1846  0.3692  0.9003  1
  Sb  Sb4  2  0.3333  0.6667  0.3735  1
]