data_[Ac4Pm12Er8]
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
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [9.2597]
_cell_length_b [10.0537]
_cell_length_c [9.1128]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.1593]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [AcPm3Er2]
_chemical_formula_sum '[Ac4 Pm12 Er8]'
_cell_volume [829.3113]
_cell_formula_units_Z [4]
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  0.0642  0.2500  1
  Pm  Pm1  8  0.2250  0.4104  0.9829  1
  Pm  Pm2  4  0.0000  0.4049  0.2500  1
  Er  Er3  8  0.1298  0.2554  0.6233  1
]