data_[Mg16Ni2Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ni  1.9100  1.3500  0.7400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.2085]
_cell_length_b [4.6897]
_cell_length_c [6.6291]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.1873]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Mg8NiAg2]
_chemical_formula_sum '[Mg16 Ni2 Ag4]'
_cell_volume [434.6187]
_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
[
  Mg  Mg0  4  0.0185  0.0000  0.7825  1
  Mg  Mg1  4  0.1040  0.5000  0.4203  1
  Mg  Mg2  4  0.1561  0.5000  0.9226  1
  Mg  Mg3  4  0.1845  0.0000  0.2449  1
  Ni  Ni4  2  0.0000  0.5000  0.0000  1
  Ag  Ag5  4  0.1822  0.0000  0.6731  1
]