data_[Tl2Ag4Sn2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [7.2445]
_cell_length_b [7.2445]
_cell_length_c [8.6266]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [TlAg2SnSe4]
_chemical_formula_sum '[Tl2 Ag4 Sn2 Se8]'
_cell_volume [452.7420]
_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
[
  Tl  Tl0  2  0.0000  0.0000  0.0000  1.0
  Ag  Ag1  4  0.0000  0.5000  0.2500  1.0
  Sn  Sn2  2  0.0000  0.0000  0.5000  1.0
  Se  Se3  8  0.2081  0.2081  0.3307  1.0
]