data_[Rb12Na16Tl8]
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/c]
_cell_length_a [16.1685]
_cell_length_b [12.3483]
_cell_length_c [9.1776]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.5006]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb3(Na2Tl)2]
_chemical_formula_sum '[Rb12 Na16 Tl8]'
_cell_volume [1747.5236]
_cell_formula_units_Z [4]
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  8  0.1192  0.0980  0.1517  1
  Rb  Rb1  4  0.0000  0.4331  0.2500  1
  Na  Na2  8  0.1163  0.2727  0.6768  1
  Na  Na3  8  0.1996  0.4041  0.0647  1
  Tl  Tl4  8  0.2349  0.3620  0.4307  1
]