data_[Na6Zn8As8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Zn  1.6500  1.3500  0.8800
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.7549]
_cell_length_b [6.6043]
_cell_length_c [14.1426]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Na3(ZnAs)4]
_chemical_formula_sum '[Na6 Zn8 As8]'
_cell_volume [444.1157]
_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  0.0000  0.0000  0.1135  1.0
  Na  Na1  2  0.0000  0.5000  0.0000  1.0
  Zn  Zn2  8  0.0000  0.1977  0.3301  1.0
  As  As3  4  0.0000  0.3043  0.5000  1.0
  As  As4  4  0.0000  0.5000  0.2178  1.0
]