data_[Rb2Na9Hg4]
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 [P-3m1]
_cell_length_a [5.4560]
_cell_length_b [5.4560]
_cell_length_c [20.8119]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Rb2Na9Hg4]
_chemical_formula_sum '[Rb2 Na9 Hg4]'
_cell_volume [536.5220]
_cell_formula_units_Z [1]
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  0.3333  0.6667  0.7697  1
  Na  Na1  2  0.0000  0.0000  0.0961  1
  Na  Na2  2  0.0000  0.0000  0.3460  1
  Na  Na3  2  0.3333  0.6667  0.5624  1
  Na  Na4  2  0.3333  0.6667  0.9615  1
  Na  Na5  1  0.0000  0.0000  0.5000  1
  Hg  Hg6  2  0.3333  0.6667  0.4017  1
  Hg  Hg7  2  0.3333  0.6667  0.1139  1
]