data_[K1Rb1Na2I4]
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
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [8.4193]
_cell_length_b [4.8506]
_cell_length_c [8.5845]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.0438]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [KRbNa2I4]
_chemical_formula_sum '[K1 Rb1 Na2 I4]'
_cell_volume [331.3936]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.5000  1
  K  K1  1  0.5000  0.0000  0.5000  1
  Na  Na2  1  0.0000  0.0000  0.0000  1
  Na  Na3  1  0.5000  0.5000  0.0000  1
  I  I4  2  0.2455  0.5000  0.2221  1
  I  I5  2  0.2657  0.0000  0.7814  1
]