data_[Rb2Ta2Tl2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ta  1.5000  1.4500  0.8200
  Tl  1.6200  1.9000  1.3325
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.4002]
_cell_length_b [6.2039]
_cell_length_c [12.1646]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.9068]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbTaTlSe4]
_chemical_formula_sum '[Rb2 Ta2 Tl2 Se8]'
_cell_volume [551.7427]
_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
[
  Rb  Rb0  2  0.2655  0.2500  0.5862  1.0
  Ta  Ta1  2  0.1745  0.7500  0.2521  1.0
  Tl  Tl2  2  0.2621  0.2500  0.0402  1.0
  Se  Se3  4  0.0547  0.5218  0.8144  1.0
  Se  Se4  2  0.2583  0.7500  0.4501  1.0
  Se  Se5  2  0.4294  0.7500  0.1522  1.0
]