data_[Pm12Pr4Tl8]
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
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.9438]
_cell_length_b [5.4917]
_cell_length_c [9.4844]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.6866]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3PrTl2]
_chemical_formula_sum '[Pm12 Pr4 Tl8]'
_cell_volume [766.6914]
_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  0.0593  0.0000  0.7141  1
  Pm  Pm1  4  0.1183  0.5000  0.5446  1
  Pr  Pr2  4  0.1289  0.0000  0.1737  1
  Pm  Pm3  4  0.1952  0.5000  0.9988  1
  Tl  Tl4  4  0.0170  0.5000  0.1700  1
  Tl  Tl5  4  0.2256  0.0000  0.5923  1
]