data_[Sm8Sn4C8]
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
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [7.2644]
_cell_length_b [5.1932]
_cell_length_c [10.2457]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Sm2SnC2]
_chemical_formula_sum '[Sm8 Sn4 C8]'
_cell_volume [386.5202]
_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  0.0458  0.7500  0.7793  1
  Sm  Sm1  4  0.1602  0.7500  0.4270  1
  Sn  Sn2  4  0.2188  0.7500  0.1158  1
  C  C3  4  0.0519  0.2500  0.7810  1
  C  C4  4  0.1480  0.2500  0.4175  1
]