data_[Na6Al4Sb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.0870]
_cell_length_b [4.2125]
_cell_length_c [9.4952]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.1284]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3(AlSb2)2]
_chemical_formula_sum '[Na6 Al4 Sb8]'
_cell_volume [514.2280]
_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  4  0.1038  0.5000  0.6876  1.0
  Na  Na1  2  0.0000  0.0000  0.0000  1.0
  Al  Al2  4  0.2122  0.5000  0.3571  1.0
  Sb  Sb3  4  0.0991  0.0000  0.3881  1.0
  Sb  Sb4  4  0.1989  0.5000  0.0585  1.0
]