data_[Ac6Ce8Si8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Ce  1.1200  1.8500  1.0800
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.5557]
_cell_length_b [7.9427]
_cell_length_c [17.1641]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Ac3(CeSi)4]
_chemical_formula_sum '[Ac6 Ce8 Si8]'
_cell_volume [621.0731]
_cell_formula_units_Z [2]
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  0.0000  0.0000  0.1103  1
  Ac  Ac1  2  0.0000  0.5000  0.0000  1
  Ce  Ce2  8  0.0000  0.1704  0.3327  1
  Si  Si3  4  0.0000  0.3310  0.5000  1
  Si  Si4  4  0.0000  0.5000  0.2450  1
]