data_[Rb4Na10Tl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.4315]
_cell_length_b [7.0601]
_cell_length_c [9.9243]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.4453]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Na5Tl4]
_chemical_formula_sum '[Rb4 Na10 Tl8]'
_cell_volume [827.4866]
_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  4  0.0223  0.0000  0.7307  1.0
  Na  Na1  8  0.2076  0.2393  0.1731  1.0
  Na  Na2  2  0.0000  0.5000  0.5000  1.0
  Tl  Tl3  4  0.0347  0.5000  0.8684  1.0
  Tl  Tl4  4  0.2180  0.5000  0.4563  1.0
]