The structure described by K4NaCl5 is Caswellsilverite-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to one Cl(2), one Cl(3), and four equivalent Cl(1) atoms to form KCl6 octahedra that share  a cornercorner with one K(2)Cl6 octahedra, corners with five equivalent K(1)Cl6 octahedra, edges with four equivalent K(1)Cl6 octahedra, edges with four equivalent K(2)Cl6 octahedra, and edges with four equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second K site, K(2) is bonded to one Cl(1) and five equivalent Cl(3) atoms to form KCl6 octahedra that share  a cornercorner with one K(1)Cl6 octahedra,  a cornercorner with one Na(1)Cl6 octahedra, corners with four equivalent K(2)Cl6 octahedra, edges with four equivalent K(1)Cl6 octahedra, and edges with eight equivalent K(2)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Na(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form NaCl6 octahedra that share corners with two equivalent K(2)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 one K(2), four equivalent K(1), and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(3)K6 octahedra, corners with five equivalent Cl(1)K5Na octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, edges with four equivalent Cl(1)K5Na octahedra, and edges with four equivalent Cl(3)K6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. 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(3)K6 octahedra, corners with four equivalent Cl(2)K2Na4 octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, and edges with eight equivalent Cl(1)K5Na octahedra. The corner-sharing octahedra are not tilted. In the third Cl site, Cl(3) is bonded to one K(1) and five equivalent K(2) atoms to form ClK6 octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra,  a cornercorner with one Cl(1)K5Na octahedra, corners with four equivalent Cl(3)K6 octahedra, edges with four equivalent Cl(1)K5Na octahedra, and edges with eight equivalent Cl(3)K6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4NaCl5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.878
_cell_length_b   15.878
_cell_length_c   15.878
_cell_angle_alpha   163.910
_cell_angle_beta   163.910
_cell_angle_gamma   22.830
_symmetry_Int_Tables_number   1
_cell_volume   307.413
_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  0.403  0.403  0.000  1.0
  K  K1  1  0.802  0.802  0.000  1.0
  K  K2  1  0.198  0.198  0.000  1.0
  K  K3  1  0.597  0.597  0.000  1.0
  Na  Na4  1  0.000  0.000  0.000  1.0
  Cl  Cl5  1  0.094  0.094  0.000  1.0
  Cl  Cl6  1  0.500  0.500  0.000  1.0
  Cl  Cl7  1  0.906  0.906  0.000  1.0
  Cl  Cl8  1  0.300  0.300  0.000  1.0
  Cl  Cl9  1  0.700  0.700  0.000  1.0
[/CIF]
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The structure described by K4NaCl5 is Caswellsilverite-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to one Cl(2), one Cl(3), and four equivalent Cl(1) atoms to form KCl6 octahedra that share  a cornercorner with one K(2)Cl6 octahedra, corners with five equivalent K(1)Cl6 octahedra, edges with four equivalent K(1)Cl6 octahedra, edges with four equivalent K(2)Cl6 octahedra, and edges with four equivalent Na(1)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second K site, K(2) is bonded to one Cl(1) and five equivalent Cl(3) atoms to form KCl6 octahedra that share  a cornercorner with one K(1)Cl6 octahedra,  a cornercorner with one Na(1)Cl6 octahedra, corners with four equivalent K(2)Cl6 octahedra, edges with four equivalent K(1)Cl6 octahedra, and edges with eight equivalent K(2)Cl6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Na(1) is bonded to two equivalent Cl(1) and four equivalent Cl(2) atoms to form NaCl6 octahedra that share corners with two equivalent K(2)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 one K(2), four equivalent K(1), and one Na(1) atom to form ClK5Na octahedra that share  a cornercorner with one Cl(3)K6 octahedra, corners with five equivalent Cl(1)K5Na octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, edges with four equivalent Cl(1)K5Na octahedra, and edges with four equivalent Cl(3)K6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. 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(3)K6 octahedra, corners with four equivalent Cl(2)K2Na4 octahedra, edges with four equivalent Cl(2)K2Na4 octahedra, and edges with eight equivalent Cl(1)K5Na octahedra. The corner-sharing octahedra are not tilted. In the third Cl site, Cl(3) is bonded to one K(1) and five equivalent K(2) atoms to form ClK6 octahedra that share  a cornercorner with one Cl(2)K2Na4 octahedra,  a cornercorner with one Cl(1)K5Na octahedra, corners with four equivalent Cl(3)K6 octahedra, edges with four equivalent Cl(1)K5Na octahedra, and edges with eight equivalent Cl(3)K6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4NaCl5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.878
_cell_length_b   15.878
_cell_length_c   15.878
_cell_angle_alpha   163.910
_cell_angle_beta   163.910
_cell_angle_gamma   22.830
_symmetry_Int_Tables_number   1
_cell_volume   307.413
_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  0.403  0.403  0.000  1.0
  K  K1  1  0.802  0.802  0.000  1.0
  K  K2  1  0.198  0.198  0.000  1.0
  K  K3  1  0.597  0.597  0.000  1.0
  Na  Na4  1  0.000  0.000  0.000  1.0
  Cl  Cl5  1  0.094  0.094  0.000  1.0
  Cl  Cl6  1  0.500  0.500  0.000  1.0
  Cl  Cl7  1  0.906  0.906  0.000  1.0
  Cl  Cl8  1  0.300  0.300  0.000  1.0
  Cl  Cl9  1  0.700  0.700  0.000  1.0
[/CIF]
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