data_[Ac20Mg4Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Mg  1.3100  1.5000  0.8600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [5.7371]
_cell_length_b [11.9803]
_cell_length_c [18.0637]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Ac5MgSn2]
_chemical_formula_sum '[Ac20 Mg4 Sn8]'
_cell_volume [1241.5538]
_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  8  0.0000  0.1063  0.1069  1
  Ac  Ac1  8  0.0000  0.4088  0.0848  1
  Ac  Ac2  4  0.0000  0.1704  0.7500  1
  Mg  Mg3  4  0.0000  0.4602  0.7500  1
  Sn  Sn4  8  0.0000  0.2484  0.5725  1
]