data_[Rb8Na4Sb8]
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
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [11.6538]
_cell_length_b [7.3051]
_cell_length_c [9.9280]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.9257]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb2NaSb2]
_chemical_formula_sum '[Rb8 Na4 Sb8]'
_cell_volume [832.5418]
_cell_formula_units_Z [4]
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  0.1500  0.3558  0.1466  1.0
  Na  Na1  4  0.0000  0.0768  0.7500  1.0
  Sb  Sb2  8  0.1447  0.1541  0.5065  1.0
]