data_[Na8Sb4As4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sb  2.0500  1.4500  0.8300
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.5730]
_cell_length_b [6.1909]
_cell_length_c [12.1105]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.1711]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2SbAs]
_chemical_formula_sum '[Na8 Sb4 As4]'
_cell_volume [438.4241]
_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  0.2116  0.6701  0.0331  1.0
  Na  Na1  4  0.2451  0.1035  0.8362  1.0
  Sb  Sb2  4  0.3112  0.5948  0.7917  1.0
  As  As3  4  0.3046  0.1672  0.1104  1.0
]