data_[Rb1Tl1Se1Br1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Se  2.5500  1.1500  1.0133
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pm]
_cell_length_a [4.2783]
_cell_length_b [4.2788]
_cell_length_c [8.1387]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.6352]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [6]
_chemical_formula_structural [RbTlSeBr]
_chemical_formula_sum '[Rb1 Tl1 Se1 Br1]'
_cell_volume [148.9773]
_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
[
  Rb  Rb0  1  0.4166  0.0000  0.0945  1
  Tl  Tl1  1  0.9046  0.5000  0.5652  1
  Se  Se2  1  0.4033  0.0000  0.5265  1
  Br  Br3  1  0.9133  0.5000  0.9379  1
]