data_[Pm9Y15Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Y  1.2200  1.8000  1.0400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [8.2396]
_cell_length_b [8.2396]
_cell_length_c [20.3277]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Pm3Y5Se8]
_chemical_formula_sum '[Pm9 Y15 Se24]'
_cell_volume [1195.1602]
_cell_formula_units_Z [3]
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  9  0.0000  0.5000  0.5000  1
  Y  Y1  9  0.0000  0.5000  0.0000  1
  Y  Y2  3  -0.0000  -0.0000  0.5000  1
  Y  Y3  3  0.0000  0.0000  0.0000  1
  Se  Se4  18  0.0047  0.5023  0.2524  1
  Se  Se5  6  0.0000  0.0000  0.2536  1
]