data_[Tl4Si2Pb2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Si  1.9000  1.1000  0.5400
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [7.7273]
_cell_length_b [8.1472]
_cell_length_c [5.3028]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Tl2SiPbO4]
_chemical_formula_sum '[Tl4 Si2 Pb2 O8]'
_cell_volume [333.8426]
_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
[
  Tl  Tl0  4  0.2230  0.6920  0.5139  1
  Si  Si1  2  0.0000  0.9065  0.9978  1
  Pb  Pb2  2  0.0000  0.1660  0.5195  1
  O  O3  4  0.1776  0.8167  0.0960  1
  O  O4  2  0.0000  0.1052  0.0839  1
  O  O5  2  0.0000  0.9060  0.6791  1
]