data_[Na4Sn4Ge8Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  Ge  2.0100  1.2500  0.7700
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.5924]
_cell_length_b [12.3422]
_cell_length_c [7.2002]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.3893]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSn(GeSe3)2]
_chemical_formula_sum '[Na4 Sn4 Ge8 Se24]'
_cell_volume [1146.2210]
_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  0.0000  0.1265  0.2500  1
  Sn  Sn1  4  0.0000  0.2481  0.7500  1
  Ge  Ge2  8  0.2096  0.4174  0.2382  1
  Se  Se3  8  0.1054  0.0747  0.6586  1
  Se  Se4  8  0.1327  0.4394  0.5035  1
  Se  Se5  8  0.1508  0.2427  0.1241  1
]