data_[Rb2Na2Sb2]
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 [P-6m2]
_cell_length_a [6.0550]
_cell_length_b [6.0550]
_cell_length_c [9.0904]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [187]
_chemical_formula_structural [RbNaSb]
_chemical_formula_sum '[Rb2 Na2 Sb2]'
_cell_volume [288.6306]
_cell_formula_units_Z [2]
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  2  0.3333  0.6667  0.7505  1
  Na  Na1  1  0.0000  0.0000  0.0000  1
  Na  Na2  1  0.6667  0.3333  0.5000  1
  Sb  Sb3  2  0.6667  0.3333  0.8394  1
]