data_[K16Rb8Na12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [8.1289]
_cell_length_b [22.8388]
_cell_length_c [12.7099]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [K4Rb2Na3]
_chemical_formula_sum '[K16 Rb8 Na12]'
_cell_volume [2359.6257]
_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  0.0000  0.0999  0.6118  1.0
  K  K1  8  0.0000  0.1870  0.9890  1.0
  K  K2  8  0.2500  0.0720  0.2500  1.0
  Na  Na3  8  0.2500  0.2432  0.2500  1.0
  Na  Na4  4  0.0000  0.0000  0.0000  1.0
]