data_[K2Rb8]
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 [P2/c]
_cell_length_a [8.7616]
_cell_length_b [14.6073]
_cell_length_c [7.6364]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.3196]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [KRb4]
_chemical_formula_sum '[K2 Rb8]'
_cell_volume [922.2935]
_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  0.1743  0.3407  0.0636  1.0
  Rb  Rb1  4  0.2538  0.1023  0.5167  1.0
  K  K2  2  0.5000  0.4004  0.7500  1.0
]