data_[Pm8Tl2Si2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Tl  1.6200  1.9000  1.3325
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [7.6077]
_cell_length_b [7.2987]
_cell_length_c [7.2521]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.4557]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Pm4TlSi]
_chemical_formula_sum '[Pm8 Tl2 Si2]'
_cell_volume [402.6653]
_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  0.1809  0.6510  0.1453  1
  Pm  Pm1  4  0.3515  0.1667  0.1700  1
  Tl  Tl2  2  0.0000  0.0000  0.0000  1
  Si  Si3  2  0.5000  0.0000  0.5000  1
]