data_[Ac4Hg8Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Hg  2.0000  1.5000  1.2450
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [3.9865]
_cell_length_b [5.1498]
_cell_length_c [30.4799]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Ac(HgPb)2]
_chemical_formula_sum '[Ac4 Hg8 Pb8]'
_cell_volume [625.7433]
_cell_formula_units_Z [4]
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
[
  Ac  Ac0  4  0.0000  0.2500  0.5730  1
  Hg  Hg1  4  0.0000  0.2500  0.0220  1
  Hg  Hg2  4  0.0000  0.2500  0.1179  1
  Pb  Pb3  4  0.0000  0.2500  0.2960  1
  Pb  Pb4  4  0.0000  0.2500  0.8201  1
]