data_[Cs1K1Rb1Na1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [5.1442]
_cell_length_b [5.1442]
_cell_length_c [11.7619]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [CsKRbNa]
_chemical_formula_sum '[Cs1 K1 Rb1 Na1]'
_cell_volume [311.2591]
_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
[
  Cs  Cs0  1  0.5000  0.5000  0.7058  1.0
  Rb  Rb1  1  0.0000  0.0000  0.0311  1.0
  K  K2  1  0.0000  0.0000  0.4105  1.0
  Na  Na3  1  0.5000  0.5000  0.2414  1.0
]