data_[Nd2Sm2Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Sm  1.1700  1.8500  1.2290
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [3.9417]
_cell_length_b [5.8700]
_cell_length_c [8.1794]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [NdSmSi2]
_chemical_formula_sum '[Nd2 Sm2 Si4]'
_cell_volume [189.2515]
_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
[
  Nd  Nd0  2  0.0000  0.1355  0.6798  1.0
  Sm  Sm1  2  0.5000  0.3639  0.3198  1.0
  Si  Si2  2  0.0000  0.3747  0.0356  1.0
  Si  Si3  2  0.5000  0.1296  0.9648  1.0
]