data_[K3Na6Al3H18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.6205]
_cell_length_b [5.6205]
_cell_length_c [14.9644]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [KNa2AlH6]
_chemical_formula_sum '[K3 Na6 Al3 H18]'
_cell_volume [409.4005]
_cell_formula_units_Z [3]
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
[
  K  K0  3  0.0000  0.0000  0.5257  1.0
  Na  Na1  3  0.0000  0.0000  0.3020  1.0
  Na  Na2  3  0.0000  0.0000  0.7835  1.0
  Al  Al3  3  0.0000  0.0000  0.9879  1.0
  H  H4  9  0.0422  0.7771  0.9141  1.0
  H  H5  9  0.0685  0.3941  0.7194  1.0
]