data_[Na12Zn2O8]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P6_3mc]
_cell_length_a [7.5443]
_cell_length_b [7.5443]
_cell_length_c [5.8175]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [186]
_chemical_formula_structural [Na6ZnO4]
_chemical_formula_sum '[Na12 Zn2 O8]'
_cell_volume [286.7496]
_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  6  0.0729  0.5364  0.6360  1
  Na  Na1  6  0.1416  0.2831  0.9649  1
  Zn  Zn2  2  0.3333  0.6667  0.2446  1
  O  O3  6  0.1875  0.3750  0.3583  1
  O  O4  2  0.3333  0.6667  0.9037  1
]