data_KNa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.78
_cell_length_b   13.78
_cell_length_c   13.78
_cell_angle_alpha   17.71
_cell_angle_beta   17.71
_cell_angle_gamma   17.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KNa
_chemical_formula_sum   'K2 Na2'
_cell_volume   211.43
_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  0.0  0.0  0.13  1.0
  K  K1  1  0.0  0.0  0.56  1.0
  Na  Na2  1  0.0  0.0  0.38  1.0
  Na  Na3  1  0.0  0.0  0.3  1.0

data_KNa
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   7.35
_cell_length_b   4.24
_cell_length_c   13.78
_cell_angle_alpha   90.0
_cell_angle_beta   100.24
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   KNa
_chemical_formula_sum   'K4 Na4'
_cell_volume   422.86
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  'x+1/2, -y+1/2, 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  4  0.0  0.0  0.29  1.0
  Na  Na1  4  0.0  0.0  0.46  1.0

K K Na Na
K K Na Na 0 3 o o o 1 2 o o o 2 3 o o o 