data_[Na6Sn4As8]
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
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.9855]
_cell_length_b [4.8898]
_cell_length_c [6.3185]
_cell_angle_alpha [90.0000]
_cell_angle_beta [112.3148]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3(SnAs2)2]
_chemical_formula_sum '[Na6 Sn4 As8]'
_cell_volume [456.9075]
_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  0.1199  0.0000  0.5631  1.0
  Na  Na1  2  0.0000  0.0000  0.0000  1.0
  Sn  Sn2  4  0.1672  0.5000  0.9957  1.0
  As  As3  4  0.0072  0.5000  0.3070  1.0
  As  As4  4  0.2175  0.0000  0.2296  1.0
]