data_[Rb12Na4]
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 [C2/m]
_cell_length_a [7.7233]
_cell_length_b [15.8099]
_cell_length_c [11.1099]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.2278]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb3Na]
_chemical_formula_sum '[Rb12 Na4]'
_cell_volume [1288.5006]
_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  0.1182  0.3400  0.2281  1.0
  Rb  Rb1  4  0.1855  0.0000  0.3660  1.0
  Na  Na2  4  0.0000  0.1148  0.0000  1.0
]