data_[Ac16Mg4]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.6416]
_cell_length_b [19.6896]
_cell_length_c [6.6863]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.4038]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Ac4Mg]
_chemical_formula_sum '[Ac16 Mg4]'
_cell_volume [849.3676]
_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  0.1876  0.4198  0.1313  1
  Ac  Ac1  8  0.2456  0.7901  0.7474  1
  Mg  Mg2  4  0.0000  0.0605  0.2500  1
]