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 [10.4490]
_cell_length_b [22.2806]
_cell_length_c [7.1373]
_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 [1661.6334]
_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  0.1294  0.7744  1
  Rb  Rb1  8  0.2500  0.1678  0.2500  1
  Na  Na2  8  0.2145  0.0000  0.0000  1
  Sn  Sn3  8  0.0000  0.0394  0.3291  1
]