data_[Mg8Ag6Hg4]
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 [8.0698]
_cell_length_b [4.9173]
_cell_length_c [8.9208]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.8870]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Mg4Ag3Hg2]
_chemical_formula_sum '[Mg8 Ag6 Hg4]'
_cell_volume [352.7051]
_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  0.0088  0.0000  0.3313  1
  Mg  Mg1  4  0.1720  0.5000  0.1143  1
  Ag  Ag2  4  0.1709  0.5000  0.4493  1
  Ag  Ag3  2  0.0000  0.0000  0.0000  1
  Hg  Hg4  4  0.1574  0.5000  0.7839  1
]