data_[Ac2Pm2Nd2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Pm  1.1300  1.8500  1.1100
  Nd  1.1400  1.8500  1.2765
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.3126]
_cell_length_b [4.2487]
_cell_length_c [10.6914]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.5980]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [AcPmNdSe3]
_chemical_formula_sum '[Ac2 Pm2 Nd2 Se6]'
_cell_volume [367.0111]
_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  2  0.1851  0.7500  0.2092  1
  Pm  Pm1  2  0.3405  0.2500  0.9048  1
  Nd  Nd2  2  0.1719  0.7500  0.6220  1
  Se  Se3  2  0.0948  0.7500  0.8911  1
  Se  Se4  2  0.2009  0.2500  0.4352  1
  Se  Se5  2  0.4718  0.2500  0.1928  1
]