data_[Pm8Er8Pb20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [16.6250]
_cell_length_b [8.1850]
_cell_length_c [8.1953]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [Pm2Er2Pb5]
_chemical_formula_sum '[Pm8 Er8 Pb20]'
_cell_volume [1115.1877]
_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
[
  Pm  Pm0  8  0.1919  0.0000  0.0000  1
  Er  Er1  8  0.0000  0.1613  0.3382  1
  Pb  Pb2  16  0.1338  0.1356  0.6349  1
  Pb  Pb3  4  0.0000  0.0000  0.0000  1
]