data_[Rb2Na12Tl4]
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 [12.4223]
_cell_length_b [6.0352]
_cell_length_c [10.4055]
_cell_angle_alpha [90.0000]
_cell_angle_beta [124.7228]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb(Na3Tl)2]
_chemical_formula_sum '[Rb2 Na12 Tl4]'
_cell_volume [641.1874]
_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  0.0000  0.5000  0.5000  1
  Na  Na1  4  0.1151  0.5000  0.9443  1
  Na  Na2  4  0.1540  0.0000  0.1504  1
  Na  Na3  4  0.2421  0.0000  0.6068  1
  Tl  Tl4  4  0.0647  0.0000  0.7656  1
]