data_[Ac2H2Pb2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  H  2.2000  0.2500  0.0000
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [4.8636]
_cell_length_b [4.8636]
_cell_length_c [7.4941]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [AcHPb]
_chemical_formula_sum '[Ac2 H2 Pb2]'
_cell_volume [177.2694]
_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
[
  Ac  Ac0  2  0.0000  0.0000  0.2470  1
  H  H1  2  0.0000  0.0000  0.9262  1
  Pb  Pb2  2  0.0000  0.0000  0.6768  1
]