data_[Tb6Y6Er3Mg6]
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
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.4521]
_cell_length_b [5.4521]
_cell_length_c [23.9788]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Tb2Y2ErMg2]
_chemical_formula_sum '[Tb6 Y6 Er3 Mg6]'
_cell_volume [617.2769]
_cell_formula_units_Z [3]
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  6  0.0000  0.0000  0.4257  1
  Y  Y1  6  0.0000  0.0000  0.1541  1
  Er  Er2  3  0.0000  0.0000  0.0000  1
  Mg  Mg3  6  0.0000  0.0000  0.2886  1
]