data_[Rb4Na16Sr4]
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
  Sr  0.9500  2.0000  1.3200
]
_symmetry_space_group_name_H-M [F-43m]
_cell_length_a [10.4221]
_cell_length_b [10.4221]
_cell_length_c [10.4221]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [216]
_chemical_formula_structural [RbNa4Sr]
_chemical_formula_sum '[Rb4 Na16 Sr4]'
_cell_volume [1132.0489]
_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  0.2500  0.2500  0.2500  1.0
  Na  Na1  16  0.1261  0.1261  0.6261  1.0
  Sr  Sr2  4  0.0000  0.0000  0.0000  1.0
]