data_[Tb2Ho2Al2Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Ho  1.2300  1.7500  1.0410
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.0797]
_cell_length_b [5.7093]
_cell_length_c [8.7320]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [TbHoAlSi2]
_chemical_formula_sum '[Tb2 Ho2 Al2 Si4]'
_cell_volume [203.3857]
_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  2  0.0000  0.5000  0.2106  1
  Ho  Ho1  2  0.0000  0.5000  0.7896  1
  Al  Al2  2  0.0000  0.0000  0.0000  1
  Si  Si3  4  0.0000  0.2106  0.4999  1
]