data_[Rb6Na8Hg2]
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 [Pmmn]
_cell_length_a [7.2263]
_cell_length_b [14.7134]
_cell_length_c [8.0243]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [59]
_chemical_formula_structural [Rb3Na4Hg]
_chemical_formula_sum '[Rb6 Na8 Hg2]'
_cell_volume [853.1729]
_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  4  0.0000  0.2595  0.1851  1
  Rb  Rb1  2  0.0000  0.0000  0.5507  1
  Na  Na2  4  0.0000  0.3734  0.6511  1
  Na  Na3  4  0.2492  0.5000  0.9822  1
  Hg  Hg4  2  0.0000  0.5000  0.3214  1
]