data_[Ac6Ce4Pm2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Ce  1.1200  1.8500  1.0800
  Pm  1.1300  1.8500  1.1100
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.4754]
_cell_length_b [12.9622]
_cell_length_c [7.5662]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.3072]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ac3Ce2PmSe6]
_chemical_formula_sum '[Ac6 Ce4 Pm2 Se12]'
_cell_volume [691.9206]
_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
[
  Ac  Ac0  4  0.0000  0.1661  0.5000  1
  Ac  Ac1  2  0.0000  0.5000  0.5000  1
  Ce  Ce2  4  0.0000  0.3335  0.0000  1
  Pm  Pm3  2  0.0000  0.0000  0.0000  1
  Se  Se4  8  0.2442  0.1666  0.2331  1
  Se  Se5  4  0.2443  0.5000  0.2326  1
]