data_[Rb6Pm4U2Se12]
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
  U  1.3800  1.7500  0.9913
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.5023]
_cell_length_b [12.9942]
_cell_length_c [8.4114]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2944]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb3Pm2USe6]
_chemical_formula_sum '[Rb6 Pm4 U2 Se12]'
_cell_volume [782.9245]
_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  0.0000  0.1683  0.5000  1
  Rb  Rb1  2  0.0000  0.5000  0.5000  1
  Pm  Pm2  4  0.0000  0.3335  0.0000  1
  U  U3  2  0.0000  0.0000  0.0000  1
  Se  Se4  8  0.2314  0.1649  0.1997  1
  Se  Se5  4  0.2371  0.5000  0.2002  1
]