data_[Rb3Na36Hg21]
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 [R-3]
_cell_length_a [15.6216]
_cell_length_b [15.6216]
_cell_length_c [9.0737]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [RbNa12Hg7]
_chemical_formula_sum '[Rb3 Na36 Hg21]'
_cell_volume [1917.6354]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.0000  1
  Na  Na1  18  0.0256  0.7777  0.8574  1
  Na  Na2  18  0.0829  0.5200  0.1635  1
  Hg  Hg3  18  0.0153  0.8180  0.2097  1
  Hg  Hg4  3  0.0000  0.0000  0.5000  1
]