data_[Tb8Tm16Mg20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Tm  1.2500  1.7500  1.0950
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [6.1428]
_cell_length_b [10.0564]
_cell_length_c [22.0024]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Tb2Tm4Mg5]
_chemical_formula_sum '[Tb8 Tm16 Mg20]'
_cell_volume [1359.1948]
_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  8  0.0000  0.0000  0.1141  1
  Tm  Tm1  16  0.0000  0.1678  0.3742  1
  Mg  Mg2  8  0.2500  0.2500  0.0000  1
  Mg  Mg3  8  0.2500  0.2500  0.2500  1
  Mg  Mg4  4  0.0000  0.0000  0.5000  1
]