data_[K4Rb2]
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
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [4.8514]
_cell_length_b [8.2043]
_cell_length_c [12.5583]
_cell_angle_alpha [78.0375]
_cell_angle_beta [81.1807]
_cell_angle_gamma [76.5081]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [K2Rb]
_chemical_formula_sum '[K4 Rb2]'
_cell_volume [472.6041]
_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  2  0.1650  0.7621  0.4105  1.0
  K  K1  2  0.1663  0.2417  0.9244  1.0
  K  K2  2  0.4976  0.2713  0.2372  1.0
]