data_[Rb4Na8Y4]
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
  Y  1.2200  1.8000  1.0400
]
_symmetry_space_group_name_H-M [I-42d]
_cell_length_a [9.5392]
_cell_length_b [9.5392]
_cell_length_c [7.8174]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [122]
_chemical_formula_structural [RbNa2Y]
_chemical_formula_sum '[Rb4 Na8 Y4]'
_cell_volume [711.3503]
_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  4  0.0000  0.0000  0.5000  1
  Na  Na1  8  0.2460  0.2500  0.1250  1
  Y  Y2  4  0.0000  0.0000  0.0000  1
]