data_[Pm12Tl4Te6Se2]
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
  Te  2.1000  1.4000  1.2933
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.4432]
_cell_length_b [4.3164]
_cell_length_c [9.1361]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.1854]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm6Tl2Te3Se]
_chemical_formula_sum '[Pm12 Tl4 Te6 Se2]'
_cell_volume [743.3672]
_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  0.0022  0.0000  0.2359  1
  Pm  Pm1  4  0.1608  0.5000  0.0816  1
  Pm  Pm2  4  0.1662  0.5000  0.5830  1
  Tl  Tl3  4  0.1668  0.0000  0.3327  1
  Te  Te4  4  0.1663  0.0000  0.8351  1
  Te  Te5  2  0.0000  0.5000  0.5000  1
  Se  Se6  2  0.0000  0.5000  0.0000  1
]