data_[K2Na4B2O6]
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
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmmn]
_cell_length_a [5.6543]
_cell_length_b [6.1113]
_cell_length_c [5.6472]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [59]
_chemical_formula_structural [KNa2BO3]
_chemical_formula_sum '[K2 Na4 B2 O6]'
_cell_volume [195.1390]
_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  0.0000  0.0000  0.0751  1.0
  Na  Na1  4  0.0000  0.2707  0.6267  1.0
  B  B2  2  0.0000  0.5000  0.2041  1.0
  O  O3  4  0.2120  0.5000  0.3342  1.0
  O  O4  2  0.0000  0.5000  0.9578  1.0
]