data_[Hg4Cl2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Hg  2.0000  1.5000  1.2450
  Cl  3.1600  1.0000  0.7800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.0064]
_cell_length_b [6.0461]
_cell_length_c [6.5795]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.3769]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Hg2ClO2]
_chemical_formula_sum '[Hg4 Cl2 O4]'
_cell_volume [235.7437]
_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
[
  Hg  Hg0  4  0.2271  0.0000  0.3652  1
  Cl  Cl1  2  0.0000  0.0000  0.0000  1
  O  O2  4  0.0000  0.2576  0.5000  1
]