data_[Pm6Cu4Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.8412]
_cell_length_b [4.5833]
_cell_length_c [8.9888]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.4570]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3(CuPb2)2]
_chemical_formula_sum '[Pm6 Cu4 Pb8]'
_cell_volume [472.3868]
_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
[
  Pm  Pm0  4  0.1282  0.5000  0.6928  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.2106  0.5000  0.4069  1
  Pb  Pb3  4  0.0789  0.0000  0.3761  1
  Pb  Pb4  4  0.1994  0.5000  0.0930  1
]