data_[K8Rb12Na4]
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 [Cmmm]
_cell_length_a [6.6310]
_cell_length_b [19.9237]
_cell_length_c [13.5854]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [K2Rb3Na]
_chemical_formula_sum '[K8 Rb12 Na4]'
_cell_volume [1794.8126]
_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  0.1687  0.2242  1.0
  K  K1  4  0.0000  0.3377  0.5000  1.0
  Rb  Rb2  4  0.0000  0.5000  0.2273  1.0
  K  K3  2  0.0000  0.0000  0.0000  1.0
  K  K4  2  0.0000  0.0000  0.5000  1.0
  Na  Na5  4  0.0000  0.3248  0.0000  1.0
]