data_[Ac4Co4Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Co  1.8800  1.3500  0.7683
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [7.1177]
_cell_length_b [4.1677]
_cell_length_c [10.5983]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [AcCoSi2]
_chemical_formula_sum '[Ac4 Co4 Si8]'
_cell_volume [314.3908]
_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  4  0.1556  0.7500  0.8775  1
  Co  Co1  4  0.0038  0.7500  0.3579  1
  Si  Si2  4  0.1141  0.7500  0.5665  1
  Si  Si3  4  0.1863  0.7500  0.1775  1
]