data_[Cs1Tl1As1Se2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Tl  1.6200  1.9000  1.3325
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [5.6683]
_cell_length_b [5.6683]
_cell_length_c [5.5133]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [CsTlAsSe2]
_chemical_formula_sum '[Cs1 Tl1 As1 Se2]'
_cell_volume [177.1391]
_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
[
  Cs  Cs0  1  0.5000  0.5000  0.5000  1
  Tl  Tl1  1  0.0000  0.0000  0.0000  1
  As  As2  1  0.0000  0.0000  0.5000  1
  Se  Se3  2  0.0000  0.5000  0.0000  1
]