data_[Pm8Pr4Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pnnm]
_cell_length_a [12.9175]
_cell_length_b [13.2399]
_cell_length_c [7.1251]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [58]
_chemical_formula_structural [Pm2PrBr5]
_chemical_formula_sum '[Pm8 Pr4 Br20]'
_cell_volume [1218.5809]
_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  4  0.0000  0.0000  0.2478  1
  Pm  Pm1  4  0.1032  0.3949  0.5000  1
  Pr  Pr2  4  0.2154  0.2973  0.0000  1
  Br  Br3  8  0.0548  0.2194  0.2536  1
  Br  Br4  4  0.1344  0.6176  0.5000  1
  Br  Br5  4  0.1645  0.9115  0.0000  1
  Br  Br6  4  0.1862  0.9965  0.5000  1
]