data_[K1Rb2Na1I4]
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 [8.7756]
_cell_length_b [5.0635]
_cell_length_c [8.8319]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.2286]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [KRb2NaI4]
_chemical_formula_sum '[K1 Rb2 Na1 I4]'
_cell_volume [370.5551]
_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  1.0
  Rb  Rb1  1  0.5000  0.0000  0.5000  1.0
  K  K2  1  0.5000  0.5000  0.0000  1.0
  Na  Na3  1  0.0000  0.0000  0.0000  1.0
  I  I4  2  0.2310  0.5000  0.2240  1.0
  I  I5  2  0.2445  0.0000  0.7704  1.0
]