data_[K2Rb14Na8]
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
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.4135]
_cell_length_b [7.7799]
_cell_length_c [13.8416]
_cell_angle_alpha [90.0000]
_cell_angle_beta [124.4823]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [KRb7Na4]
_chemical_formula_sum '[K2 Rb14 Na8]'
_cell_volume [1723.2521]
_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  0.0697  0.0000  0.3951  1.0
  Rb  Rb1  4  0.2094  0.5000  0.6612  1.0
  Rb  Rb2  4  0.2141  0.0000  0.8888  1.0
  K  K3  2  0.0000  0.0000  0.0000  1.0
  Rb  Rb4  2  0.0000  0.5000  0.0000  1.0
  Na  Na5  4  0.0366  0.5000  0.7381  1.0
  Na  Na6  4  0.1793  0.5000  0.3397  1.0
]