The structure described by Co5CuO8 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are eight inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(1)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the second Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(2)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the third Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(2)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the fourth Co site, Co(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(1)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the fifth Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; edges with two equivalent Co(3)O6 octahedra; and edges with two equivalent Co(4)O6 octahedra. In the sixth Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; edges with two equivalent Co(3)O6 octahedra; and edges with two equivalent Co(4)O6 octahedra. In the seventh Co site, Co(4) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; and edges with four equivalent Co(3)O6 octahedra. In the eighth Co site, Co(4) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; and edges with four equivalent Co(3)O6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two O(6,6) and four O(3,3) atoms to form CuO6 octahedra that share corners with six Co(1,1)O4 tetrahedra; edges with two Co(4,4)O6 octahedra; and edges with four Co(3,3)O6 octahedra. In the second Cu site, Cu(2) is bonded to two O(5,5) and four O(4,4) atoms to form CuO6 octahedra that share corners with six Co(2,2)O4 tetrahedra; edges with two Co(4,4)O6 octahedra; and edges with four Co(3,3)O6 octahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Co(2), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the second O site, O(2) is bonded to one Co(1), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the third O site, O(2) is bonded to one Co(1), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the fourth O site, O(1) is bonded to one Co(2), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the fifth O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(4), and one Cu(1) atom. In the sixth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(3), one Co(4), and one Cu(2) atom. In the seventh O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(3), one Co(4), and one Cu(2) atom. In the eighth O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(4), and one Cu(1) atom. In the ninth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Co(3), and one Cu(2) atom. In the tenth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one Cu(1) atom. In the eleventh O site, O(5) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Co(3), and one Cu(2) atom. In the twelfth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one Cu(1) atom. is represented by the CIF file [CIF]
data_Co5CuO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   5.703
_cell_length_c   5.743
_cell_angle_alpha   60.238
_cell_angle_beta   90.000
_cell_angle_gamma   60.009
_symmetry_Int_Tables_number   1
_cell_volume   132.565
_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
  Co  Co0  1  0.001  0.998  0.004  1.0
  Co  Co1  1  0.249  0.502  0.747  1.0
  Co  Co2  1  0.125  0.250  0.375  1.0
  Co  Co3  1  0.625  0.750  0.375  1.0
  Co  Co4  1  0.625  0.250  0.375  1.0
  Cu  Cu5  1  0.625  0.750  0.875  1.0
  O  O6  1  0.387  0.225  0.162  1.0
  O  O7  1  0.863  0.275  0.588  1.0
  O  O8  1  0.380  0.780  0.599  1.0
  O  O9  1  0.410  0.720  0.151  1.0
  O  O10  1  0.870  0.720  0.151  1.0
  O  O11  1  0.870  0.260  0.150  1.0
  O  O12  1  0.380  0.240  0.599  1.0
  O  O13  1  0.840  0.780  0.599  1.0
[/CIF]
.
The structure described by Co5CuO8 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are eight inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(1)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the second Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(2)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the third Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(2)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the fourth Co site, Co(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with three Co(4,4)O6 octahedra; corners with three equivalent Cu(1)O6 octahedra; and corners with six Co(3,3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-62°. In the fifth Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; edges with two equivalent Co(3)O6 octahedra; and edges with two equivalent Co(4)O6 octahedra. In the sixth Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; edges with two equivalent Co(3)O6 octahedra; and edges with two equivalent Co(4)O6 octahedra. In the seventh Co site, Co(4) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; and edges with four equivalent Co(3)O6 octahedra. In the eighth Co site, Co(4) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three Co(1,1)O4 tetrahedra; corners with three Co(2,2)O4 tetrahedra;  an edgeedge with one Cu(1)O6 octahedra;  an edgeedge with one Cu(2)O6 octahedra; and edges with four equivalent Co(3)O6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two O(6,6) and four O(3,3) atoms to form CuO6 octahedra that share corners with six Co(1,1)O4 tetrahedra; edges with two Co(4,4)O6 octahedra; and edges with four Co(3,3)O6 octahedra. In the second Cu site, Cu(2) is bonded to two O(5,5) and four O(4,4) atoms to form CuO6 octahedra that share corners with six Co(2,2)O4 tetrahedra; edges with two Co(4,4)O6 octahedra; and edges with four Co(3,3)O6 octahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Co(2), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the second O site, O(2) is bonded to one Co(1), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the third O site, O(2) is bonded to one Co(1), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the fourth O site, O(1) is bonded to one Co(2), one Co(4), and two equivalent Co(3) atoms to form distorted corner-sharing OCo4 trigonal pyramids. In the fifth O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(4), and one Cu(1) atom. In the sixth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(3), one Co(4), and one Cu(2) atom. In the seventh O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(3), one Co(4), and one Cu(2) atom. In the eighth O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(4), and one Cu(1) atom. In the ninth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Co(3), and one Cu(2) atom. In the tenth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one Cu(1) atom. In the eleventh O site, O(5) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Co(3), and one Cu(2) atom. In the twelfth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one Cu(1) atom. is represented by the CIF file [CIF]
data_Co5CuO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   5.703
_cell_length_c   5.743
_cell_angle_alpha   60.238
_cell_angle_beta   90.000
_cell_angle_gamma   60.009
_symmetry_Int_Tables_number   1
_cell_volume   132.565
_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
  Co  Co0  1  0.001  0.998  0.004  1.0
  Co  Co1  1  0.249  0.502  0.747  1.0
  Co  Co2  1  0.125  0.250  0.375  1.0
  Co  Co3  1  0.625  0.750  0.375  1.0
  Co  Co4  1  0.625  0.250  0.375  1.0
  Cu  Cu5  1  0.625  0.750  0.875  1.0
  O  O6  1  0.387  0.225  0.162  1.0
  O  O7  1  0.863  0.275  0.588  1.0
  O  O8  1  0.380  0.780  0.599  1.0
  O  O9  1  0.410  0.720  0.151  1.0
  O  O10  1  0.870  0.720  0.151  1.0
  O  O11  1  0.870  0.260  0.150  1.0
  O  O12  1  0.380  0.240  0.599  1.0
  O  O13  1  0.840  0.780  0.599  1.0
[/CIF]
.