data_[Ag8Hg4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4_1md]
_cell_length_a [6.3970]
_cell_length_b [6.3970]
_cell_length_c [8.1408]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [109]
_chemical_formula_structural [Ag2HgO2]
_chemical_formula_sum '[Ag8 Hg4 O8]'
_cell_volume [333.1336]
_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
[
  Ag  Ag0  8  0.0000  0.2268  0.4323  1
  Hg  Hg1  4  0.0000  0.0000  0.7375  1
  O  O2  8  0.0000  0.2280  0.1643  1
]