data_[Cs2Rb2Tl2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [6.5095]
_cell_length_b [8.4375]
_cell_length_c [7.3841]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [CsRbTlSe2]
_chemical_formula_sum '[Cs2 Rb2 Tl2 Se4]'
_cell_volume [405.5643]
_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
[
  Cs  Cs0  2  0.2500  0.5000  0.2039  1
  Rb  Rb1  2  0.2500  0.0000  0.4311  1
  Tl  Tl2  2  0.0000  0.0000  0.0000  1
  Se  Se3  4  0.2500  0.2451  0.7916  1
]