data_[Rb4Hg2O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [9.9025]
_cell_length_b [4.1296]
_cell_length_c [7.0257]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.6280]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [Rb2HgO]
_chemical_formula_sum '[Rb4 Hg2 O2]'
_cell_volume [277.9951]
_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
[
  Rb  Rb0  2  0.1398  0.0000  0.1709  1.0
  Rb  Rb1  2  0.3303  0.5000  0.8378  1.0
  Hg  Hg2  2  0.4921  0.0000  0.5563  1.0
  O  O3  2  0.0392  0.5000  0.8990  1.0
]