data_[Ac1Mg6Ag2]
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
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [4.4821]
_cell_length_b [4.4821]
_cell_length_c [10.9193]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Ac(Mg3Ag)2]
_chemical_formula_sum '[Ac1 Mg6 Ag2]'
_cell_volume [219.3637]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.0000  1
  Mg  Mg1  4  0.0000  0.5000  0.2876  1
  Mg  Mg2  1  0.0000  0.0000  0.5000  1
  Mg  Mg3  1  0.5000  0.5000  0.5000  1
  Ag  Ag4  2  0.5000  0.5000  0.1304  1
]