data_[Na4Sn4Te2Se4]
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
  Te  2.1000  1.4000  1.2933
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.4899]
_cell_length_b [5.8651]
_cell_length_c [8.8553]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.1426]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Sn2TeSe2]
_chemical_formula_sum '[Na4 Sn4 Te2 Se4]'
_cell_volume [434.6084]
_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  0.1914  0.5000  0.0780  1
  Sn  Sn1  4  0.0921  0.0000  0.3921  1
  Te  Te2  2  0.0000  0.0000  0.0000  1
  Se  Se3  4  0.1098  0.5000  0.3583  1
]