data_[Tb8Er4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Er  1.2400  1.7500  1.0300
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.1509]
_cell_length_b [4.2955]
_cell_length_c [10.3897]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.7522]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb2ErSi2]
_chemical_formula_sum '[Tb8 Er4 Si8]'
_cell_volume [484.2341]
_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
[
  Tb  Tb0  4  0.0160  0.5000  0.6881  1.0
  Tb  Tb1  4  0.1797  0.5000  0.0885  1.0
  Er  Er2  4  0.2222  0.0000  0.3633  1.0
  Si  Si3  4  0.0184  0.0000  0.8947  1.0
  Si  Si4  4  0.1111  0.0000  0.5590  1.0
]