data_[Tb8Y6Er6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.7436]
_cell_length_b [13.0719]
_cell_length_c [13.0717]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Tb4(YEr)3]
_chemical_formula_sum '[Tb8 Y6 Er6]'
_cell_volume [639.6654]
_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
[
  Tb  Tb0  4  0.0000  0.1281  0.0013  1
  Tb  Tb1  2  0.0000  0.0000  0.3702  1
  Tb  Tb2  2  0.0000  0.0000  0.6282  1
  Y  Y3  4  0.5000  0.1704  0.4996  1
  Y  Y4  2  0.5000  0.0000  0.8298  1
  Er  Er5  4  0.0000  0.2494  0.2499  1
  Er  Er6  2  0.5000  0.0000  0.1701  1
]