data_[Rb4Sn2Hg2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [8.6398]
_cell_length_b [8.0590]
_cell_length_c [6.2651]
_cell_angle_alpha [90.0000]
_cell_angle_beta [131.4635]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [Rb2SnHgO4]
_chemical_formula_sum '[Rb4 Sn2 Hg2 O8]'
_cell_volume [326.8995]
_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  0.0000  0.7422  0.0000  1.0
  Rb  Rb1  2  0.0000  0.9764  0.5000  1.0
  Sn  Sn2  2  0.0000  0.2661  0.0000  1.0
  Hg  Hg3  2  0.0000  0.4634  0.5000  1.0
  O  O4  4  0.1492  0.4234  0.9326  1.0
  O  O5  4  0.2148  0.1591  0.3697  1.0
]