data_[K4Rb6Na8]
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 [C2/m]
_cell_length_a [15.3720]
_cell_length_b [6.8898]
_cell_length_c [10.5732]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.8033]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Rb3Na4]
_chemical_formula_sum '[K4 Rb6 Na8]'
_cell_volume [1087.4683]
_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
[
  Rb  Rb0  4  0.0283  0.5000  0.2910  1.0
  K  K1  4  0.2432  0.0000  0.3325  1.0
  Rb  Rb2  2  0.0000  0.0000  0.0000  1.0
  Na  Na3  4  0.1081  0.0000  0.6234  1.0
  Na  Na4  4  0.2276  0.5000  0.0559  1.0
]