data_[K2Na2Be2Cl8]
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
  Be  1.5700  1.0500  0.5900
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.5160]
_cell_length_b [6.8700]
_cell_length_c [8.3866]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.9480]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KNaBeCl4]
_chemical_formula_sum '[K2 Na2 Be2 Cl8]'
_cell_volume [357.1539]
_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
[
  K  K0  2  0.2731  0.2500  0.0689  1
  Na  Na1  2  0.2163  0.2500  0.5490  1
  Be  Be2  2  0.2239  0.7500  0.3142  1
  Cl  Cl3  4  0.0226  0.5142  0.2702  1
  Cl  Cl4  2  0.4073  0.7500  0.1561  1
  Cl  Cl5  2  0.4125  0.7500  0.5556  1
]