data_[U4Fe4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  U  1.3800  1.7500  0.9913
  Fe  1.8300  1.4000  0.8525
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [6.3381]
_cell_length_b [3.9652]
_cell_length_c [9.9031]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [UFeSi2]
_chemical_formula_sum '[U4 Fe4 Si8]'
_cell_volume [248.8844]
_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
[
  U  U0  4  0.1822  0.2500  0.1231  1
  Fe  Fe1  4  0.0034  0.7500  0.3930  1
  Si  Si2  4  0.1384  0.2500  0.8193  1
  Si  Si3  4  0.2032  0.2500  0.4164  1
]