data_[Ac1Ce1Er2Bi4]
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
  Er  1.2400  1.7500  1.0300
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.9464]
_cell_length_b [4.6090]
_cell_length_c [7.9817]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.5192]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [AcCe(ErBi2)2]
_chemical_formula_sum '[Ac1 Ce1 Er2 Bi4]'
_cell_volume [275.5280]
_cell_formula_units_Z [1]
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  1  0.5000  0.5000  0.0000  1
  Ce  Ce1  1  0.5000  0.0000  0.5000  1
  Er  Er2  1  0.0000  0.0000  0.0000  1
  Er  Er3  1  0.0000  0.5000  0.5000  1
  Bi  Bi4  2  0.2302  0.0000  0.7360  1
  Bi  Bi5  2  0.2353  0.5000  0.2522  1
]