data_[Mg3Tl6Pb3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.6644]
_cell_length_b [5.6644]
_cell_length_c [14.8124]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [MgTl2PbO6]
_chemical_formula_sum '[Mg3 Tl6 Pb3 O18]'
_cell_volume [411.5885]
_cell_formula_units_Z [3]
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
[
  Mg  Mg0  3  0.0000  0.0000  0.3128  1.0
  Tl  Tl1  3  0.0000  0.0000  0.0308  1.0
  Tl  Tl2  3  0.0000  0.0000  0.5342  1.0
  Pb  Pb3  3  0.0000  0.0000  0.8123  1.0
  O  O4  9  0.0188  0.3825  0.5800  1.0
  O  O5  9  0.0234  0.7225  0.4108  1.0
]