data_[Li2Ac4Si2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Ac  1.1000  1.9500  1.2600
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.7435]
_cell_length_b [4.6600]
_cell_length_c [7.9582]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.0942]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [LiAc2Si]
_chemical_formula_sum '[Li2 Ac4 Si2]'
_cell_volume [239.0386]
_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
[
  Li  Li0  2  0.4191  0.7500  0.3097  1
  Ac  Ac1  2  0.1465  0.2500  0.3955  1
  Ac  Ac2  2  0.2469  0.2500  0.9371  1
  Si  Si3  2  0.3730  0.7500  0.6852  1
]