data_[Pm16Te6Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  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 [12.1738]
_cell_length_b [12.1868]
_cell_length_c [8.6014]
_cell_angle_alpha [90.0000]
_cell_angle_beta [134.9213]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm8Te3Se4]
_chemical_formula_sum '[Pm16 Te6 Se8]'
_cell_volume [903.5803]
_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  0.0000  0.2401  0.0000  1
  Pm  Pm1  4  0.0000  0.2638  0.5000  1
  Pm  Pm2  4  0.2487  0.5000  0.5167  1
  Pm  Pm3  4  0.2497  0.5000  0.9777  1
  Te  Te4  4  0.2500  0.2500  0.0000  1
  Te  Te5  2  0.0000  0.0000  0.5000  1
  Se  Se6  4  0.2500  0.2500  0.5000  1
  Se  Se7  2  0.0000  0.0000  0.0000  1
  Se  Se8  2  0.0000  0.5000  0.5000  1
]