data_[Na12Zn3As6]
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 [R-3m]
_cell_length_a [5.1243]
_cell_length_b [5.1243]
_cell_length_c [25.4270]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na4ZnAs2]
_chemical_formula_sum '[Na12 Zn3 As6]'
_cell_volume [578.2286]
_cell_formula_units_Z [3]
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  6  0.0000  0.0000  0.2093  1.0
  Na  Na1  6  0.0000  0.0000  0.3967  1.0
  Zn  Zn2  3  0.0000  0.0000  0.0000  1.0
  As  As3  6  0.0000  0.0000  0.0912  1.0
]