data_[Tl4Fe4Ag4Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Fe  1.8300  1.4000  0.8525
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.6339]
_cell_length_b [14.3492]
_cell_length_c [10.6327]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [TlFeAgSe3]
_chemical_formula_sum '[Tl4 Fe4 Ag4 Se12]'
_cell_volume [554.4206]
_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
[
  Tl  Tl0  4  0.0000  0.2760  0.7500  1
  Fe  Fe1  4  0.0000  0.0000  0.0000  1
  Ag  Ag2  4  0.0000  0.3967  0.2500  1
  Se  Se3  8  0.0000  0.3873  0.0078  1
  Se  Se4  4  0.0000  0.0441  0.2500  1
]