data_[Sm8Sn20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [4.6191]
_cell_length_b [35.3442]
_cell_length_c [4.6215]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Sm2Sn5]
_chemical_formula_sum '[Sm8 Sn20]'
_cell_volume [754.5028]
_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
[
  Sm  Sm0  4  0.0000  0.0688  0.5000  1.0
  Sm  Sm1  4  0.0000  0.2042  0.5000  1.0
  Sn  Sn2  4  0.0000  0.1398  0.0000  1.0
  Sn  Sn3  4  0.0000  0.2787  0.0000  1.0
  Sn  Sn4  4  0.0000  0.3603  0.5000  1.0
  Sn  Sn5  4  0.0000  0.4270  0.0000  1.0
  Sn  Sn6  2  0.0000  0.0000  0.0000  1.0
  Sn  Sn7  2  0.0000  0.5000  0.5000  1.0
]