data_[Ac1Nd1Sm1Er1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Nd  1.1400  1.8500  1.2765
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [P3m1]
_cell_length_a [3.7319]
_cell_length_b [3.7319]
_cell_length_c [11.9291]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [156]
_chemical_formula_structural [AcNdSmEr]
_chemical_formula_sum '[Ac1 Nd1 Sm1 Er1]'
_cell_volume [143.8750]
_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  0.0000  0.0000  0.4297  1
  Nd  Nd1  1  0.6667  0.3333  0.1652  1
  Sm  Sm2  1  0.3333  0.6667  0.9200  1
  Er  Er3  1  0.6667  0.3333  0.6843  1
]