data_[Tb8Y4Mg4]
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
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.9176]
_cell_length_b [3.4423]
_cell_length_c [11.1610]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.2726]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb2YMg]
_chemical_formula_sum '[Tb8 Y4 Mg4]'
_cell_volume [494.9054]
_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  0.0118  0.5000  0.7837  1
  Tb  Tb1  4  0.2407  0.0000  0.7554  1
  Y  Y2  4  0.1319  0.5000  0.5024  1
  Mg  Mg3  4  0.1330  0.0000  0.0133  1
]