data_[Rb2Na1Tl3]
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 [Pmm2]
_cell_length_a [3.9995]
_cell_length_b [8.0956]
_cell_length_c [19.6220]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [Rb2NaTl3]
_chemical_formula_sum '[Rb2 Na1 Tl3]'
_cell_volume [635.3323]
_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  0.0000  0.0000  0.6287  1
  Rb  Rb1  1  0.0000  0.5000  0.6043  1
  Na  Na2  1  0.0000  0.5000  0.4000  1
  Tl  Tl3  2  0.5000  0.2257  0.4870  1
  Tl  Tl4  1  0.0000  0.0000  0.3931  1
]