data_[K4Tl2Bi2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tl  1.6200  1.9000  1.3325
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [7.9388]
_cell_length_b [7.7746]
_cell_length_c [6.2031]
_cell_angle_alpha [90.0000]
_cell_angle_beta [126.6420]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [K2TlBiO4]
_chemical_formula_sum '[K4 Tl2 Bi2 O8]'
_cell_volume [307.2023]
_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
[
  K  K0  2  0.0000  0.2764  0.5000  1.0
  K  K1  2  0.0000  0.5299  0.0000  1.0
  Tl  Tl2  2  0.0000  0.7453  0.5000  1.0
  Bi  Bi3  2  0.0000  0.0231  0.0000  1.0
  O  O4  4  0.1623  0.8408  0.9199  1.0
  O  O5  4  0.2356  0.5653  0.5480  1.0
]