data_[Na10Si4Sb10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.5845]
_cell_length_b [3.7761]
_cell_length_c [12.5119]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.1923]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na5Si2Sb5]
_chemical_formula_sum '[Na10 Si4 Sb10]'
_cell_volume [699.5118]
_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  0.1737  0.5000  0.0667  1
  Na  Na1  4  0.2196  0.0000  0.6302  1
  Na  Na2  2  0.0000  0.5000  0.5000  1
  Si  Si3  4  0.0324  0.0000  0.7976  1
  Sb  Sb4  4  0.1132  0.0000  0.3708  1
  Sb  Sb5  4  0.1438  0.5000  0.7944  1
  Sb  Sb6  2  0.0000  0.0000  0.0000  1
]