data_[Mg20Ag8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.7527]
_cell_length_b [5.2875]
_cell_length_c [7.9849]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.8417]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Mg5Ag2]
_chemical_formula_sum '[Mg20 Ag8]'
_cell_volume [575.2112]
_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
[
  Mg  Mg0  8  0.1215  0.1791  0.4485  1.0
  Mg  Mg1  8  0.2182  0.3457  0.8211  1.0
  Mg  Mg2  4  0.0000  0.2494  0.7500  1.0
  Ag  Ag3  8  0.0859  0.3190  0.0947  1.0
]