data_[Sm2Fe2Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Fe  1.8300  1.4000  0.8525
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [4.3185]
_cell_length_b [3.9826]
_cell_length_c [8.0350]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.1614]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [SmFeSi2]
_chemical_formula_sum '[Sm2 Fe2 Si4]'
_cell_volume [134.5626]
_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
[
  Sm  Sm0  2  0.4045  0.2500  0.7953  1.0
  Fe  Fe1  2  0.1184  0.2500  0.3912  1.0
  Si  Si2  2  0.0402  0.2500  0.0978  1.0
  Si  Si3  2  0.3275  0.7500  0.5071  1.0
]