data_K2Na
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.61
_cell_length_b   8.61
_cell_length_c   10.0
_cell_angle_alpha   105.06
_cell_angle_beta   105.06
_cell_angle_gamma   29.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2Na
_chemical_formula_sum   'K4 Na2'
_cell_volume   353.69
_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  1  0.54  0.0  0.34  1.0
  K  K1  1  0.02  0.0  0.6  1.0
  K  K2  1  0.93  0.0  0.02  1.0
  K  K3  1  0.41  0.0  0.28  1.0
  Na  Na4  1  0.59  0.0  0.38  1.0
  Na  Na5  1  0.37  0.0  0.25  1.0

data_K2Na
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.41
_cell_length_b   8.61
_cell_length_c   10.0
_cell_angle_alpha   105.06
_cell_angle_beta   90.0
_cell_angle_gamma   104.86
_symmetry_Int_Tables_number   2
_chemical_formula_structural   K2Na
_chemical_formula_sum   'K4 Na2'
_cell_volume   353.69
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  0.0  0.04  0.79  1.0
  K  K1  2  0.0  0.43  0.47  1.0
  Na  Na2  2  0.0  0.39  0.44  1.0

K K K K Na Na