data_[Na2Pm4Pr6Se12]
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
  Pr  1.1300  1.8500  1.0600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.3148]
_cell_length_b [12.6944]
_cell_length_c [7.3578]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.4809]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaPm2(PrSe2)3]
_chemical_formula_sum '[Na2 Pm4 Pr6 Se12]'
_cell_volume [644.1096]
_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  2  0.0000  0.0000  0.0000  1
  Pr  Pr1  4  0.0000  0.1642  0.5000  1
  Pm  Pm2  4  0.0000  0.3344  0.0000  1
  Pr  Pr3  2  0.0000  0.5000  0.5000  1
  Se  Se4  8  0.2471  0.1660  0.2446  1
  Se  Se5  4  0.2499  0.0000  0.7601  1
]