data_[K4Rb2O2]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.1401]
_cell_length_b [5.3896]
_cell_length_c [15.1363]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [K2RbO]
_chemical_formula_sum '[K4 Rb2 O2]'
_cell_volume [337.7434]
_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  2  0.0000  0.5000  0.3749  1.0
  Rb  Rb1  2  0.0000  0.5000  0.6126  1.0
  K  K2  2  0.0000  0.5000  0.9831  1.0
  O  O3  2  0.0000  0.0000  0.9866  1.0
]