data_[Rb6Tl2Ag8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [7.0568]
_cell_length_b [7.7935]
_cell_length_c [10.1196]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [Rb3TlAg4]
_chemical_formula_sum '[Rb6 Tl2 Ag8]'
_cell_volume [556.5440]
_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  0.0000  0.2432  0.4148  1
  Rb  Rb1  2  0.0000  0.0000  0.0554  1
  Tl  Tl2  2  0.0000  0.5000  0.0205  1
  Ag  Ag3  4  0.0000  0.3147  0.7696  1
  Ag  Ag4  4  0.1937  0.0000  0.7022  1
]