data_[Pm8Si2Sb2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [7.3863]
_cell_length_b [7.3649]
_cell_length_c [7.3146]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.2897]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Pm4SiSb]
_chemical_formula_sum '[Pm8 Si2 Sb2]'
_cell_volume [397.9094]
_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  0.1699  0.1489  0.3567  1
  Pm  Pm1  4  0.3548  0.6665  0.3301  1
  Si  Si2  2  0.5000  0.0000  0.5000  1
  Sb  Sb3  2  0.0000  0.0000  0.0000  1
]