data_[Th18Cu12Hg6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Th  1.3000  1.8000  1.0800
  Cu  1.9000  1.3500  0.8200
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [R-3c]
_cell_length_a [8.2655]
_cell_length_b [8.2655]
_cell_length_c [16.1997]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [167]
_chemical_formula_structural [Th3Cu2Hg]
_chemical_formula_sum '[Th18 Cu12 Hg6]'
_cell_volume [958.4761]
_cell_formula_units_Z [6]
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
[
  Th  Th0  18  0.0000  0.3121  0.7500  1
  Cu  Cu1  12  0.0000  0.0000  0.1664  1
  Hg  Hg2  6  0.0000  0.0000  0.0000  1
]