data_[Na8Zn4Ge8]
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
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.7112]
_cell_length_b [4.5043]
_cell_length_c [10.6730]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.9803]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2ZnGe2]
_chemical_formula_sum '[Na8 Zn4 Ge8]'
_cell_volume [446.0375]
_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  4  0.0879  0.0000  0.8931  1.0
  Na  Na1  4  0.1792  0.5000  0.6880  1.0
  Zn  Zn2  4  0.1388  0.5000  0.3566  1.0
  Ge  Ge3  4  0.0802  0.0000  0.4439  1.0
  Ge  Ge4  4  0.1190  0.5000  0.1042  1.0
]