The compound described by K2NaCl3 is Caswellsilverite-like structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded to one Cl(2) and five equivalent Cl(1) atoms to form KCl6 octahedra that share  a cornercorner with one Na(1)Cl6 octahedra, corners with five equivalent K(1)Cl6 octahedra, edges with four equivalent Na(1)Cl6 octahedra, and edges with eight equivalent K(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. Na(1) is bonded to two Cl(1,1) and four equivalent Cl(2) atoms to form NaCl6 octahedra that share corners with two equivalent K(1)Cl6 octahedra, corners with four equivalent Na(1)Cl6 octahedra, edges with four equivalent Na(1)Cl6 octahedra, and edges with eight equivalent K(1)Cl6 octahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to five equivalent K(1) and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra, corners with five equivalent Cl(1)K5Na octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, and edges with eight equivalent Cl(1)K5Na octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the second Cl site, Cl(2) is bonded to two equivalent K(1) and four equivalent Na(1) atoms to form ClK2Na4 octahedra that share corners with two equivalent Cl(1)K5Na octahedra; corners with four equivalent Cl(2)K2Na4 octahedra; edges with four equivalent Cl(2)K2Na4 octahedra; and edges with eight Cl(1,1)K5Na octahedra. The corner-sharing octahedra are not tilted. In the third Cl site, Cl(1) is bonded to five equivalent K(1) and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra; corners with five Cl(1,1)K5Na octahedra; edges with four equivalent Cl(2)K2Na4 octahedra; and edges with eight Cl(1,1)K5Na octahedra. The corner-sharing octahedral tilt angles range from 0-5°. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2NaCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.682
_cell_length_b   9.682
_cell_length_c   9.682
_cell_angle_alpha   153.699
_cell_angle_beta   153.699
_cell_angle_gamma   37.537
_symmetry_Int_Tables_number   1
_cell_volume   177.930
_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  0.334  0.334  0.000  1.0
  K  K1  1  0.666  0.666  0.000  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Cl  Cl3  1  0.842  0.842  0.000  1.0
  Cl  Cl4  1  0.158  0.158  0.000  1.0
  Cl  Cl5  1  0.500  0.500  0.000  1.0
[/CIF]
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The compound described by K2NaCl3 is Caswellsilverite-like structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded to one Cl(2) and five equivalent Cl(1) atoms to form KCl6 octahedra that share  a cornercorner with one Na(1)Cl6 octahedra, corners with five equivalent K(1)Cl6 octahedra, edges with four equivalent Na(1)Cl6 octahedra, and edges with eight equivalent K(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. Na(1) is bonded to two Cl(1,1) and four equivalent Cl(2) atoms to form NaCl6 octahedra that share corners with two equivalent K(1)Cl6 octahedra, corners with four equivalent Na(1)Cl6 octahedra, edges with four equivalent Na(1)Cl6 octahedra, and edges with eight equivalent K(1)Cl6 octahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to five equivalent K(1) and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra, corners with five equivalent Cl(1)K5Na octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, and edges with eight equivalent Cl(1)K5Na octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the second Cl site, Cl(2) is bonded to two equivalent K(1) and four equivalent Na(1) atoms to form ClK2Na4 octahedra that share corners with two equivalent Cl(1)K5Na octahedra; corners with four equivalent Cl(2)K2Na4 octahedra; edges with four equivalent Cl(2)K2Na4 octahedra; and edges with eight Cl(1,1)K5Na octahedra. The corner-sharing octahedra are not tilted. In the third Cl site, Cl(1) is bonded to five equivalent K(1) and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra; corners with five Cl(1,1)K5Na octahedra; edges with four equivalent Cl(2)K2Na4 octahedra; and edges with eight Cl(1,1)K5Na octahedra. The corner-sharing octahedral tilt angles range from 0-5°. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2NaCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.682
_cell_length_b   9.682
_cell_length_c   9.682
_cell_angle_alpha   153.699
_cell_angle_beta   153.699
_cell_angle_gamma   37.537
_symmetry_Int_Tables_number   1
_cell_volume   177.930
_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  0.334  0.334  0.000  1.0
  K  K1  1  0.666  0.666  0.000  1.0
  Na  Na2  1  0.000  0.000  0.000  1.0
  Cl  Cl3  1  0.842  0.842  0.000  1.0
  Cl  Cl4  1  0.158  0.158  0.000  1.0
  Cl  Cl5  1  0.500  0.500  0.000  1.0
[/CIF]
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