data_[K6Rb2Na8]
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 [Imm2]
_cell_length_a [7.9383]
_cell_length_b [15.0704]
_cell_length_c [7.7073]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [K3RbNa4]
_chemical_formula_sum '[K6 Rb2 Na8]'
_cell_volume [922.0446]
_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  4  0.0000  0.2688  0.3828  1.0
  K  K1  2  0.0000  0.0000  0.1767  1.0
  Rb  Rb2  2  0.0000  0.5000  0.7562  1.0
  Na  Na3  4  0.0000  0.2156  0.8769  1.0
  Na  Na4  4  0.2277  0.0000  0.6984  1.0
]