data_[Tb16Y4Mg2]
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 [16.2098]
_cell_length_b [6.6171]
_cell_length_c [6.6775]
_cell_angle_alpha [90.0000]
_cell_angle_beta [101.1409]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb8Y2Mg]
_chemical_formula_sum '[Tb16 Y4 Mg2]'
_cell_volume [702.7407]
_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  8  0.0814  0.2596  0.3846  1
  Tb  Tb1  4  0.0949  0.5000  0.9141  1
  Tb  Tb2  4  0.2467  0.0000  0.3209  1
  Y  Y3  4  0.1866  0.0000  0.8000  1
  Mg  Mg4  2  0.0000  0.0000  0.0000  1
]