data_[Pm10Pb2Se10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.4369]
_cell_length_b [6.0340]
_cell_length_c [8.5478]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.2741]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm5PbSe5]
_chemical_formula_sum '[Pm10 Pb2 Se10]'
_cell_volume [658.0872]
_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  0.1660  0.0000  0.8210  1
  Pm  Pm1  4  0.1688  0.0000  0.3432  1
  Pm  Pm2  2  0.0000  0.5000  0.0000  1
  Pb  Pb3  2  0.0000  0.0000  0.0000  1
  Se  Se4  4  0.1649  0.5000  0.3344  1
  Se  Se5  4  0.1713  0.5000  0.8395  1
  Se  Se6  2  0.0000  0.0000  0.5000  1
]