data_[Na4Zn2Ge2Se8]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [8.0082]
_cell_length_b [8.1489]
_cell_length_c [6.9131]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2ZnGeSe4]
_chemical_formula_sum '[Na4 Zn2 Ge2 Se8]'
_cell_volume [451.1347]
_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  0.2434  0.3335  0.0053  1.0
  Zn  Zn1  2  0.0000  0.1389  0.5102  1.0
  Ge  Ge2  2  0.0000  0.8472  0.0003  1.0
  Se  Se3  4  0.2448  0.6873  0.0865  1.0
  Se  Se4  2  0.0000  0.1086  0.1493  1.0
  Se  Se5  2  0.0000  0.8664  0.6566  1.0
]