data_[Rb4Pm2Cd4Se8]
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
  Cd  1.6900  1.5500  1.0900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.9205]
_cell_length_b [4.2831]
_cell_length_c [8.5751]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.0942]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Pm(CdSe2)2]
_chemical_formula_sum '[Rb4 Pm2 Cd4 Se8]'
_cell_volume [571.6575]
_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
[
  Rb  Rb0  4  0.1267  0.0000  0.5609  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Cd  Cd2  4  0.1870  0.5000  0.0139  1
  Se  Se3  4  0.0241  0.5000  0.7786  1
  Se  Se4  4  0.1885  0.0000  0.2170  1
]