data_[K2Ta2Tl4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ta  1.5000  1.4500  0.8200
  Tl  1.6200  1.9000  1.3325
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [10.7368]
_cell_length_b [6.5407]
_cell_length_c [6.0766]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.3979]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [KTaTl2O4]
_chemical_formula_sum '[K2 Ta2 Tl4 O8]'
_cell_volume [364.2495]
_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  0.4732  0.5000  0.9979  1.0
  Ta  Ta1  2  0.2417  0.5000  0.2836  1.0
  Tl  Tl2  2  0.2128  0.0000  0.6862  1.0
  Tl  Tl3  2  0.4969  0.0000  0.4927  1.0
  O  O4  4  0.1561  0.2729  0.3439  1.0
  O  O5  2  0.2048  0.5000  0.9470  1.0
  O  O6  2  0.4434  0.5000  0.5177  1.0
]