The material described by K3Cu5O4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), and two equivalent O(1) atoms. In the second K site, K(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third K site, K(3) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted edge-sharing KO4 trigonal pyramids. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(2) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(1) and one O(2) atom. In the third Cu site, Cu(3) is bonded in a linear geometry to one O(3) and one O(4) atom. In the fourth Cu site, Cu(4) is bonded in a linear geometry to one O(1) and one O(2) atom. In the fifth Cu site, Cu(5) is bonded in a linear geometry to one O(3) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one K(2), one K(3), two equivalent K(1), one Cu(2), and one Cu(4) atom to form distorted OK4Cu2 octahedra that share corners with two equivalent O(3)K2Cu3 trigonal bipyramids and  an edgeedge with one O(1)K4Cu2 octahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(1), one K(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the third O site, O(3) is bonded to one K(2), one K(3), one Cu(1), one Cu(3), and one Cu(5) atom to form distorted corner-sharing OK2Cu3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-71°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(1), one K(2), two equivalent K(3), one Cu(3), and one Cu(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Cu5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.324
_cell_length_b   9.547
_cell_length_c   14.071
_cell_angle_alpha   73.094
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   941.438
_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  0.418  0.673  0.396  1.0
  K  K1  1  0.918  0.327  0.104  1.0
  K  K2  1  0.582  0.327  0.604  1.0
  K  K3  1  0.082  0.673  0.896  1.0
  K  K4  1  0.726  0.732  0.082  1.0
  K  K5  1  0.226  0.268  0.418  1.0
  K  K6  1  0.274  0.268  0.918  1.0
  K  K7  1  0.774  0.732  0.582  1.0
  K  K8  1  0.838  0.099  0.908  1.0
  K  K9  1  0.162  0.901  0.092  1.0
  K  K10  1  0.338  0.901  0.592  1.0
  K  K11  1  0.662  0.099  0.408  1.0
  Cu  Cu12  1  0.050  0.305  0.628  1.0
  Cu  Cu13  1  0.550  0.695  0.872  1.0
  Cu  Cu14  1  0.950  0.695  0.372  1.0
  Cu  Cu15  1  0.450  0.305  0.128  1.0
  Cu  Cu16  1  0.306  0.551  0.115  1.0
  Cu  Cu17  1  0.806  0.449  0.385  1.0
  Cu  Cu18  1  0.694  0.449  0.885  1.0
  Cu  Cu19  1  0.334  0.063  0.256  1.0
  Cu  Cu20  1  0.834  0.937  0.244  1.0
  Cu  Cu21  1  0.666  0.937  0.744  1.0
  Cu  Cu22  1  0.166  0.063  0.756  1.0
  Cu  Cu23  1  0.552  0.435  0.266  1.0
  Cu  Cu24  1  0.052  0.565  0.234  1.0
  Cu  Cu25  1  0.448  0.565  0.734  1.0
  Cu  Cu26  1  0.948  0.435  0.766  1.0
  Cu  Cu27  1  0.587  0.063  0.116  1.0
  Cu  Cu28  1  0.087  0.937  0.384  1.0
  Cu  Cu29  1  0.413  0.937  0.884  1.0
  Cu  Cu30  1  0.913  0.063  0.616  1.0
  Cu  Cu31  1  0.194  0.551  0.615  1.0
  O  O32  1  0.567  0.387  0.402  1.0
  O  O33  1  0.454  0.516  0.871  1.0
  O  O34  1  0.046  0.516  0.371  1.0
  O  O35  1  0.954  0.484  0.629  1.0
  O  O36  1  0.546  0.484  0.129  1.0
  O  O37  1  0.152  0.131  0.617  1.0
  O  O38  1  0.652  0.869  0.883  1.0
  O  O39  1  0.848  0.869  0.383  1.0
  O  O40  1  0.348  0.131  0.117  1.0
  O  O41  1  0.679  0.003  0.608  1.0
  O  O42  1  0.179  0.997  0.892  1.0
  O  O43  1  0.321  0.997  0.392  1.0
  O  O44  1  0.067  0.613  0.098  1.0
  O  O45  1  0.433  0.613  0.598  1.0
  O  O46  1  0.933  0.387  0.902  1.0
  O  O47  1  0.821  0.003  0.108  1.0
[/CIF]
.
The material described by K3Cu5O4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), and two equivalent O(1) atoms. In the second K site, K(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third K site, K(3) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted edge-sharing KO4 trigonal pyramids. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(2) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(1) and one O(2) atom. In the third Cu site, Cu(3) is bonded in a linear geometry to one O(3) and one O(4) atom. In the fourth Cu site, Cu(4) is bonded in a linear geometry to one O(1) and one O(2) atom. In the fifth Cu site, Cu(5) is bonded in a linear geometry to one O(3) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one K(2), one K(3), two equivalent K(1), one Cu(2), and one Cu(4) atom to form distorted OK4Cu2 octahedra that share corners with two equivalent O(3)K2Cu3 trigonal bipyramids and  an edgeedge with one O(1)K4Cu2 octahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(1), one K(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the third O site, O(3) is bonded to one K(2), one K(3), one Cu(1), one Cu(3), and one Cu(5) atom to form distorted corner-sharing OK2Cu3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-71°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(1), one K(2), two equivalent K(3), one Cu(3), and one Cu(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Cu5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.324
_cell_length_b   9.547
_cell_length_c   14.071
_cell_angle_alpha   73.094
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   941.438
_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  0.418  0.673  0.396  1.0
  K  K1  1  0.918  0.327  0.104  1.0
  K  K2  1  0.582  0.327  0.604  1.0
  K  K3  1  0.082  0.673  0.896  1.0
  K  K4  1  0.726  0.732  0.082  1.0
  K  K5  1  0.226  0.268  0.418  1.0
  K  K6  1  0.274  0.268  0.918  1.0
  K  K7  1  0.774  0.732  0.582  1.0
  K  K8  1  0.838  0.099  0.908  1.0
  K  K9  1  0.162  0.901  0.092  1.0
  K  K10  1  0.338  0.901  0.592  1.0
  K  K11  1  0.662  0.099  0.408  1.0
  Cu  Cu12  1  0.050  0.305  0.628  1.0
  Cu  Cu13  1  0.550  0.695  0.872  1.0
  Cu  Cu14  1  0.950  0.695  0.372  1.0
  Cu  Cu15  1  0.450  0.305  0.128  1.0
  Cu  Cu16  1  0.306  0.551  0.115  1.0
  Cu  Cu17  1  0.806  0.449  0.385  1.0
  Cu  Cu18  1  0.694  0.449  0.885  1.0
  Cu  Cu19  1  0.334  0.063  0.256  1.0
  Cu  Cu20  1  0.834  0.937  0.244  1.0
  Cu  Cu21  1  0.666  0.937  0.744  1.0
  Cu  Cu22  1  0.166  0.063  0.756  1.0
  Cu  Cu23  1  0.552  0.435  0.266  1.0
  Cu  Cu24  1  0.052  0.565  0.234  1.0
  Cu  Cu25  1  0.448  0.565  0.734  1.0
  Cu  Cu26  1  0.948  0.435  0.766  1.0
  Cu  Cu27  1  0.587  0.063  0.116  1.0
  Cu  Cu28  1  0.087  0.937  0.384  1.0
  Cu  Cu29  1  0.413  0.937  0.884  1.0
  Cu  Cu30  1  0.913  0.063  0.616  1.0
  Cu  Cu31  1  0.194  0.551  0.615  1.0
  O  O32  1  0.567  0.387  0.402  1.0
  O  O33  1  0.454  0.516  0.871  1.0
  O  O34  1  0.046  0.516  0.371  1.0
  O  O35  1  0.954  0.484  0.629  1.0
  O  O36  1  0.546  0.484  0.129  1.0
  O  O37  1  0.152  0.131  0.617  1.0
  O  O38  1  0.652  0.869  0.883  1.0
  O  O39  1  0.848  0.869  0.383  1.0
  O  O40  1  0.348  0.131  0.117  1.0
  O  O41  1  0.679  0.003  0.608  1.0
  O  O42  1  0.179  0.997  0.892  1.0
  O  O43  1  0.321  0.997  0.392  1.0
  O  O44  1  0.067  0.613  0.098  1.0
  O  O45  1  0.433  0.613  0.598  1.0
  O  O46  1  0.933  0.387  0.902  1.0
  O  O47  1  0.821  0.003  0.108  1.0
[/CIF]
.