data_[K18Rb6Na4]
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 [Immm]
_cell_length_a [6.9187]
_cell_length_b [16.5773]
_cell_length_c [17.5078]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [K9Rb3Na2]
_chemical_formula_sum '[K18 Rb6 Na4]'
_cell_volume [2008.0296]
_cell_formula_units_Z [2]
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
[
  K  K0  8  0.0000  0.2817  0.1360  1
  K  K1  8  0.0000  0.3682  0.3713  1
  Rb  Rb2  4  0.0000  0.0000  0.2940  1
  Rb  Rb3  2  0.0000  0.0000  0.0000  1
  K  K4  2  0.0000  0.5000  0.0000  1
  Na  Na5  4  0.0000  0.1493  0.5000  1
]