data_[Na8Zn8Si4]
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
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [9.2710]
_cell_length_b [5.7305]
_cell_length_c [8.0627]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.7938]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2Zn2Si]
_chemical_formula_sum '[Na8 Zn8 Si4]'
_cell_volume [422.1143]
_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  8  0.1519  0.3848  0.1651  1
  Zn  Zn1  8  0.1291  0.1323  0.5018  1
  Si  Si2  4  0.0000  0.1028  0.7500  1
]