data_[Rb6Na18]
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
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.3712]
_cell_length_b [8.0097]
_cell_length_c [12.5198]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5464]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbNa3]
_chemical_formula_sum '[Rb6 Na18]'
_cell_volume [1176.1568]
_cell_formula_units_Z [6]
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  0.1427  0.0000  0.4270  1.0
  Rb  Rb1  2  0.0000  0.0000  0.0000  1.0
  Na  Na2  8  0.1711  0.2522  0.7579  1.0
  Na  Na3  4  0.0847  0.5000  0.2477  1.0
  Na  Na4  4  0.1650  0.5000  0.0016  1.0
  Na  Na5  2  0.0000  0.5000  0.5000  1.0
]