data_[Rb9Pm9Sn3Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Pm  1.1300  1.8500  1.1100
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [8.5143]
_cell_length_b [8.5143]
_cell_length_c [24.6036]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Rb3Pm3SnSe8]
_chemical_formula_sum '[Rb9 Pm9 Sn3 Se24]'
_cell_volume [1544.6494]
_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
[
  Rb  Rb0  9  0.0000  0.5000  0.5000  1
  Pm  Pm1  9  0.0000  0.5000  0.0000  1
  Sn  Sn2  3  -0.0000  -0.0000  0.0000  1
  Se  Se3  18  0.0190  0.5095  0.7305  1
  Se  Se4  6  0.0000  0.0000  0.2672  1
]