data_[K1Na2C2O6]
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
  C  2.5500  0.7000  0.3000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [5.5355]
_cell_length_b [5.9916]
_cell_length_c [6.0594]
_cell_angle_alpha [93.8851]
_cell_angle_beta [109.8568]
_cell_angle_gamma [113.4794]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [KNa2(CO3)2]
_chemical_formula_sum '[K1 Na2 C2 O6]'
_cell_volume [168.4990]
_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
[
  K  K0  1  0.0000  0.5000  0.5000  1.0
  Na  Na1  2  0.3828  0.1494  0.7796  1.0
  C  C2  2  0.2946  0.2381  0.2480  1.0
  O  O3  2  0.1323  0.1086  0.3499  1.0
  O  O4  2  0.2966  0.4463  0.2061  1.0
  O  O5  2  0.4581  0.1598  0.1920  1.0
]