data_[Mg4Ag8Hg6]
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
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.5670]
_cell_length_b [4.2655]
_cell_length_c [9.0429]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.6749]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Mg2Ag4Hg3]
_chemical_formula_sum '[Mg4 Ag8 Hg6]'
_cell_volume [351.6022]
_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  0.1645  0.5000  0.2171  1
  Ag  Ag1  4  0.0018  0.0000  0.6717  1
  Ag  Ag2  4  0.1669  0.5000  0.8914  1
  Hg  Hg3  4  0.1691  0.5000  0.5647  1
  Hg  Hg4  2  0.0000  0.0000  0.0000  1
]