data_[Rb8Na4Hg4F20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [3.8090]
_cell_length_b [15.0343]
_cell_length_c [12.1240]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2NaHgF5]
_chemical_formula_sum '[Rb8 Na4 Hg4 F20]'
_cell_volume [694.2954]
_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  0.0952  0.6864  1.0
  Rb  Rb1  4  0.0000  0.1387  0.2951  1.0
  Na  Na2  4  0.0000  0.4689  0.4596  1.0
  Hg  Hg3  4  0.0000  0.2169  0.0160  1.0
  F  F4  4  0.0000  0.0667  0.0433  1.0
  F  F5  4  0.0000  0.2762  0.6422  1.0
  F  F6  4  0.0000  0.3128  0.3965  1.0
  F  F7  4  0.0000  0.3661  0.9987  1.0
  F  F8  4  0.0000  0.4931  0.7862  1.0
]