data_[Rb4Sm4U2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sm  1.1700  1.8500  1.2290
  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 [7.3811]
_cell_length_b [12.7135]
_cell_length_c [8.5600]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.0121]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Sm2USe6]
_chemical_formula_sum '[Rb4 Sm4 U2 Se12]'
_cell_volume [768.1246]
_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  0.1695  0.0000  1
  Sm  Sm1  4  0.0000  0.3335  0.5000  1
  U  U2  2  0.0000  0.0000  0.5000  1
  Se  Se3  8  0.2276  0.1623  0.6931  1
  Se  Se4  4  0.2430  0.5000  0.6922  1
]