data_[Tl1Se3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmm2]
_cell_length_a [3.8230]
_cell_length_b [3.8516]
_cell_length_c [7.8357]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [TlSe3]
_chemical_formula_sum '[Tl1 Se3]'
_cell_volume [115.3803]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.3295  1
  Se  Se1  1  0.0000  0.0000  0.9333  1
  Se  Se2  1  0.5000  0.0000  0.4436  1
  Se  Se3  1  0.5000  0.5000  0.9603  1
]