data_[Na6Pm2U4Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  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 [7.2340]
_cell_length_b [12.5313]
_cell_length_c [7.4600]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.8677]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3Pm(USe3)2]
_chemical_formula_sum '[Na6 Pm2 U4 Se12]'
_cell_volume [639.9246]
_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
[
  Na  Na0  4  0.0000  0.1649  0.5000  1
  Na  Na1  2  0.0000  0.5000  0.5000  1
  Pm  Pm2  2  0.0000  0.0000  0.0000  1
  U  U3  4  0.0000  0.3331  0.0000  1
  Se  Se4  8  0.2479  0.1695  0.2348  1
  Se  Se5  4  0.2393  0.5000  0.2350  1
]