data_[Ac20Sn8C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Sn  1.9600  1.4500  0.8300
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [6.0326]
_cell_length_b [11.5479]
_cell_length_c [16.5139]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Ac5Sn2C]
_chemical_formula_sum '[Ac20 Sn8 C4]'
_cell_volume [1150.4183]
_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
[
  Ac  Ac0  16  0.0000  0.1489  0.3799  1
  Ac  Ac1  4  0.0000  0.0000  0.0000  1
  Sn  Sn2  8  0.0000  0.0000  0.1961  1
  C  C3  4  0.0000  0.0000  0.5000  1
]