data_[Rb4Hg2F8]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.0903]
_cell_length_b [6.6251]
_cell_length_c [7.7865]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.8789]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb2HgF4]
_chemical_formula_sum '[Rb4 Hg2 F8]'
_cell_volume [346.0838]
_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  0.2535  0.7500  0.4487  1.0
  Rb  Rb1  2  0.3362  0.7500  0.9597  1.0
  Hg  Hg2  2  0.2059  0.2500  0.1863  1.0
  F  F3  4  0.4546  0.0235  0.2482  1.0
  F  F4  2  0.0028  0.2500  0.3464  1.0
  F  F5  2  0.0110  0.7500  0.0902  1.0
]