The crystal structure described by KNaSO4 crystallizes in the trigonal P-3m1 space group. K(1) is bonded in a 10-coordinate geometry to one O(2) and nine equivalent O(1) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to six equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. S(1) is bonded to one O(2) and three equivalent O(1) atoms to form SO4 tetrahedra that share corners with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 19°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one S(1) atom. In the second O site, O(2) is bonded in a linear geometry to one K(1) and one S(1) atom. is represented by the CIF card [CIF]
data_KNaSO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.684
_cell_length_b   5.684
_cell_length_c   7.260
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   203.107
_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  0.333  0.667  0.664  1.0
  K  K1  1  0.667  0.333  0.336  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.333  0.667  0.215  1.0
  S  S5  1  0.667  0.333  0.785  1.0
  O  O6  1  0.810  0.620  0.711  1.0
  O  O7  1  0.620  0.810  0.289  1.0
  O  O8  1  0.190  0.380  0.289  1.0
  O  O9  1  0.380  0.190  0.711  1.0
  O  O10  1  0.667  0.333  0.986  1.0
  O  O11  1  0.810  0.190  0.711  1.0
  O  O12  1  0.190  0.810  0.289  1.0
  O  O13  1  0.333  0.667  0.014  1.0
[/CIF]
.
The crystal structure described by KNaSO4 crystallizes in the trigonal P-3m1 space group. K(1) is bonded in a 10-coordinate geometry to one O(2) and nine equivalent O(1) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to six equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. S(1) is bonded to one O(2) and three equivalent O(1) atoms to form SO4 tetrahedra that share corners with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 19°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one S(1) atom. In the second O site, O(2) is bonded in a linear geometry to one K(1) and one S(1) atom. is represented by the CIF card [CIF]
data_KNaSO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.684
_cell_length_b   5.684
_cell_length_c   7.260
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   203.107
_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  0.333  0.667  0.664  1.0
  K  K1  1  0.667  0.333  0.336  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.333  0.667  0.215  1.0
  S  S5  1  0.667  0.333  0.785  1.0
  O  O6  1  0.810  0.620  0.711  1.0
  O  O7  1  0.620  0.810  0.289  1.0
  O  O8  1  0.190  0.380  0.289  1.0
  O  O9  1  0.380  0.190  0.711  1.0
  O  O10  1  0.667  0.333  0.986  1.0
  O  O11  1  0.810  0.190  0.711  1.0
  O  O12  1  0.190  0.810  0.289  1.0
  O  O13  1  0.333  0.667  0.014  1.0
[/CIF]
.