data_[Pm24Mg8Tl4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [5.1806]
_cell_length_b [13.7820]
_cell_length_c [15.6149]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Pm6Mg2Tl]
_chemical_formula_sum '[Pm24 Mg8 Tl4]'
_cell_volume [1114.8904]
_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  16  0.0000  0.1596  0.3339  1
  Pm  Pm1  8  0.0000  0.1557  0.0000  1
  Mg  Mg2  8  0.0000  0.0000  0.1708  1
  Tl  Tl3  4  0.0000  0.0000  0.5000  1
]