The compound described by K2NaCl3 is Caswellsilverite-like structured and crystallizes in the trigonal P-3m1 space group. K(1) is bonded to three equivalent Cl(1) and three equivalent Cl(2) atoms to form KCl6 octahedra that share corners with three equivalent K(1)Cl6 octahedra, corners with three equivalent Na(1)Cl6 octahedra, edges with three equivalent Na(1)Cl6 octahedra, and edges with nine equivalent K(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. Na(1) is bonded to six equivalent Cl(1) atoms to form NaCl6 octahedra that share corners with six equivalent K(1)Cl6 octahedra, edges with six equivalent K(1)Cl6 octahedra, and edges with six equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles are 6°. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to three equivalent K(1) and three equivalent Na(1) atoms to form ClK3Na3 octahedra that share corners with three equivalent Cl(1)K3Na3 octahedra, corners with three equivalent Cl(2)K6 octahedra, edges with three equivalent Cl(2)K6 octahedra, and edges with nine equivalent Cl(1)K3Na3 octahedra. The corner-sharing octahedra are not tilted. In the second Cl site, Cl(2) is bonded to six equivalent K(1) atoms to form ClK6 octahedra that share corners with six equivalent Cl(1)K3Na3 octahedra, edges with six equivalent Cl(1)K3Na3 octahedra, and edges with six equivalent Cl(2)K6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_K2NaCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   4.274
_cell_length_c   10.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   167.223
_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  0.333  0.667  0.679  1.0
  K  K1  1  0.667  0.333  0.321  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Cl  Cl3  1  0.333  0.667  0.143  1.0
  Cl  Cl4  1  0.667  0.333  0.857  1.0
  Cl  Cl5  1  0.000  0.000  0.500  1.0
[/CIF]
.
The compound described by K2NaCl3 is Caswellsilverite-like structured and crystallizes in the trigonal P-3m1 space group. K(1) is bonded to three equivalent Cl(1) and three equivalent Cl(2) atoms to form KCl6 octahedra that share corners with three equivalent K(1)Cl6 octahedra, corners with three equivalent Na(1)Cl6 octahedra, edges with three equivalent Na(1)Cl6 octahedra, and edges with nine equivalent K(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. Na(1) is bonded to six equivalent Cl(1) atoms to form NaCl6 octahedra that share corners with six equivalent K(1)Cl6 octahedra, edges with six equivalent K(1)Cl6 octahedra, and edges with six equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles are 6°. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to three equivalent K(1) and three equivalent Na(1) atoms to form ClK3Na3 octahedra that share corners with three equivalent Cl(1)K3Na3 octahedra, corners with three equivalent Cl(2)K6 octahedra, edges with three equivalent Cl(2)K6 octahedra, and edges with nine equivalent Cl(1)K3Na3 octahedra. The corner-sharing octahedra are not tilted. In the second Cl site, Cl(2) is bonded to six equivalent K(1) atoms to form ClK6 octahedra that share corners with six equivalent Cl(1)K3Na3 octahedra, edges with six equivalent Cl(1)K3Na3 octahedra, and edges with six equivalent Cl(2)K6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_K2NaCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   4.274
_cell_length_c   10.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   167.223
_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  0.333  0.667  0.679  1.0
  K  K1  1  0.667  0.333  0.321  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Cl  Cl3  1  0.333  0.667  0.143  1.0
  Cl  Cl4  1  0.667  0.333  0.857  1.0
  Cl  Cl5  1  0.000  0.000  0.500  1.0
[/CIF]
.