The material described by K2CuCl4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent Cl(3), three equivalent Cl(2), and four equivalent Cl(1) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Cl(2), two equivalent Cl(1), and three equivalent Cl(3) atoms. Cu(1) is bonded in a tetrahedral geometry to one Cl(2), one Cl(3), and two equivalent Cl(1) atoms. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Cu(1) atom. In the second Cl site, Cl(2) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Cu(1) atom. In the third Cl site, Cl(3) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cu(1) atom. is represented by the CIF file [CIF]
data_K2CuCl4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.054
_cell_length_b   9.346
_cell_length_c   12.172
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   802.436
_cell_formula_units_Z   4
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  0.250  0.994  0.173  1.0
  K  K1  1  0.750  0.006  0.827  1.0
  K  K2  1  0.750  0.506  0.673  1.0
  K  K3  1  0.250  0.494  0.327  1.0
  K  K4  1  0.250  0.647  0.917  1.0
  K  K5  1  0.750  0.353  0.083  1.0
  K  K6  1  0.750  0.853  0.417  1.0
  K  K7  1  0.250  0.147  0.583  1.0
  Cu  Cu8  1  0.250  0.725  0.575  1.0
  Cu  Cu9  1  0.750  0.275  0.425  1.0
  Cu  Cu10  1  0.750  0.775  0.075  1.0
  Cu  Cu11  1  0.250  0.225  0.925  1.0
  Cl  Cl12  1  0.981  0.804  0.653  1.0
  Cl  Cl13  1  0.019  0.196  0.347  1.0
  Cl  Cl14  1  0.019  0.696  0.153  1.0
  Cl  Cl15  1  0.481  0.196  0.347  1.0
  Cl  Cl16  1  0.981  0.304  0.847  1.0
  Cl  Cl17  1  0.519  0.804  0.653  1.0
  Cl  Cl18  1  0.519  0.304  0.847  1.0
  Cl  Cl19  1  0.481  0.696  0.153  1.0
  Cl  Cl20  1  0.250  0.485  0.597  1.0
  Cl  Cl21  1  0.750  0.515  0.403  1.0
  Cl  Cl22  1  0.750  0.015  0.097  1.0
  Cl  Cl23  1  0.250  0.985  0.903  1.0
  Cl  Cl24  1  0.250  0.333  0.090  1.0
  Cl  Cl25  1  0.750  0.667  0.910  1.0
  Cl  Cl26  1  0.750  0.167  0.590  1.0
  Cl  Cl27  1  0.250  0.833  0.410  1.0
[/CIF]
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The material described by K2CuCl4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent Cl(3), three equivalent Cl(2), and four equivalent Cl(1) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Cl(2), two equivalent Cl(1), and three equivalent Cl(3) atoms. Cu(1) is bonded in a tetrahedral geometry to one Cl(2), one Cl(3), and two equivalent Cl(1) atoms. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Cu(1) atom. In the second Cl site, Cl(2) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Cu(1) atom. In the third Cl site, Cl(3) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cu(1) atom. is represented by the CIF file [CIF]
data_K2CuCl4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.054
_cell_length_b   9.346
_cell_length_c   12.172
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   802.436
_cell_formula_units_Z   4
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  0.250  0.994  0.173  1.0
  K  K1  1  0.750  0.006  0.827  1.0
  K  K2  1  0.750  0.506  0.673  1.0
  K  K3  1  0.250  0.494  0.327  1.0
  K  K4  1  0.250  0.647  0.917  1.0
  K  K5  1  0.750  0.353  0.083  1.0
  K  K6  1  0.750  0.853  0.417  1.0
  K  K7  1  0.250  0.147  0.583  1.0
  Cu  Cu8  1  0.250  0.725  0.575  1.0
  Cu  Cu9  1  0.750  0.275  0.425  1.0
  Cu  Cu10  1  0.750  0.775  0.075  1.0
  Cu  Cu11  1  0.250  0.225  0.925  1.0
  Cl  Cl12  1  0.981  0.804  0.653  1.0
  Cl  Cl13  1  0.019  0.196  0.347  1.0
  Cl  Cl14  1  0.019  0.696  0.153  1.0
  Cl  Cl15  1  0.481  0.196  0.347  1.0
  Cl  Cl16  1  0.981  0.304  0.847  1.0
  Cl  Cl17  1  0.519  0.804  0.653  1.0
  Cl  Cl18  1  0.519  0.304  0.847  1.0
  Cl  Cl19  1  0.481  0.696  0.153  1.0
  Cl  Cl20  1  0.250  0.485  0.597  1.0
  Cl  Cl21  1  0.750  0.515  0.403  1.0
  Cl  Cl22  1  0.750  0.015  0.097  1.0
  Cl  Cl23  1  0.250  0.985  0.903  1.0
  Cl  Cl24  1  0.250  0.333  0.090  1.0
  Cl  Cl25  1  0.750  0.667  0.910  1.0
  Cl  Cl26  1  0.750  0.167  0.590  1.0
  Cl  Cl27  1  0.250  0.833  0.410  1.0
[/CIF]
.