data_[Rb16Na8Sn8]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [10.5451]
_cell_length_b [22.6554]
_cell_length_c [6.9941]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [Rb2NaSn]
_chemical_formula_sum '[Rb16 Na8 Sn8]'
_cell_volume [1670.9054]
_cell_formula_units_Z [8]
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  8  0.0000  0.1291  0.7745  1.0
  Rb  Rb1  8  0.2500  0.1675  0.2500  1.0
  Na  Na2  8  0.2155  0.0000  0.0000  1.0
  Sn  Sn3  8  0.0000  0.0407  0.3315  1.0
]