data_[Rb3Na1]
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 [Pmm2]
_cell_length_a [4.5428]
_cell_length_b [4.8132]
_cell_length_c [14.4596]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [Rb3Na]
_chemical_formula_sum '[Rb3 Na1]'
_cell_volume [316.1669]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.2622  1.0
  Rb  Rb1  1  0.5000  0.0000  0.5383  1.0
  Rb  Rb2  1  0.5000  0.5000  0.8391  1.0
  Na  Na3  1  0.0000  0.0000  0.0271  1.0
]