data_[Li2Ac2Be2Si4]
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
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [I-4m2]
_cell_length_a [4.3124]
_cell_length_b [4.3124]
_cell_length_c [9.8837]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [119]
_chemical_formula_structural [LiAcBeSi2]
_chemical_formula_sum '[Li2 Ac2 Be2 Si4]'
_cell_volume [183.8043]
_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  0.0000  0.5000  0.7500  1
  Ac  Ac1  2  0.0000  0.0000  0.0000  1
  Be  Be2  2  0.0000  0.5000  0.2500  1
  Si  Si3  4  0.0000  0.0000  0.3775  1
]