data_[Rb4Ag4Hg4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [Cmme]
_cell_length_a [6.7562]
_cell_length_b [13.0321]
_cell_length_c [5.0338]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [67]
_chemical_formula_structural [RbAgHgO2]
_chemical_formula_sum '[Rb4 Ag4 Hg4 O8]'
_cell_volume [443.2142]
_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
[
  Rb  Rb0  4  0.0000  0.2500  0.7374  1.0
  Ag  Ag1  4  0.0000  0.0000  0.0000  1.0
  Hg  Hg2  4  0.2500  0.0000  0.5000  1.0
  O  O3  8  0.0000  0.1049  0.3153  1.0
]