data_[Tb8Al4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.8592]
_cell_length_b [4.1829]
_cell_length_c [10.1228]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.0302]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb2AlSi2]
_chemical_formula_sum '[Tb8 Al4 Si8]'
_cell_volume [413.1624]
_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  0.0078  0.0000  0.6783  1.0
  Tb  Tb1  4  0.1876  0.0000  0.1057  1.0
  Al  Al2  4  0.2148  0.5000  0.3440  1.0
  Si  Si3  4  0.0273  0.5000  0.8951  1.0
  Si  Si4  4  0.1361  0.5000  0.5630  1.0
]