data_[Rb2Na14Hg8]
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
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.5950]
_cell_length_b [5.9467]
_cell_length_c [11.1580]
_cell_angle_alpha [90.0000]
_cell_angle_beta [125.9530]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbNa7Hg4]
_chemical_formula_sum '[Rb2 Na14 Hg8]'
_cell_volume [783.9362]
_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  0.0000  0.0000  1.0
  Na  Na1  4  0.0654  0.0000  0.3956  1.0
  Na  Na2  4  0.1732  0.5000  0.6087  1.0
  Na  Na3  4  0.2170  0.0000  0.8703  1.0
  Na  Na4  2  0.0000  0.5000  0.0000  1.0
  Hg  Hg5  4  0.0637  0.5000  0.7776  1.0
  Hg  Hg6  4  0.1853  0.5000  0.3328  1.0
]