data_[La2Sm4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Sm  1.1700  1.8500  1.2290
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.9441]
_cell_length_b [4.4602]
_cell_length_c [17.8177]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [La(SmSi2)2]
_chemical_formula_sum '[La2 Sm4 Si8]'
_cell_volume [313.4422]
_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
[
  La  La0  2  0.0000  0.5000  0.5000  1
  Sm  Sm1  4  0.0000  0.0000  0.1823  1
  Si  Si2  4  0.0000  0.0000  0.3522  1
  Si  Si3  4  0.0000  0.5000  0.0668  1
]