The material structure described by Co9Cu3O16 is Spinel-like structured and crystallizes in the orthorhombic C222 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), two equivalent O(1), and three equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, corners with three equivalent Cu(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), two equivalent O(3), and three equivalent O(4) atoms to form CoO6 octahedra that share  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Cu(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. In the third Co site, Co(3) is bonded to four equivalent O(3) atoms to form corner-sharing CoO4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-60°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form CuO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the second Cu site, Cu(2) is bonded to four equivalent O(1) atoms to form CuO4 tetrahedra that share corners with four equivalent Co(2)O6 octahedra and corners with eight equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. There are four inequivalent O sites. In the first O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), and two equivalent Co(2) atoms. In the second O site, O(4) is bonded to three equivalent Co(2) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCo3Cu trigonal pyramids. In the third O site, O(1) is bonded to one Co(2), two equivalent Co(1), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OCo3Cu tetrahedra. In the fourth O site, O(2) is bonded to three equivalent Co(1) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCo3Cu trigonal pyramids. is represented by the CIF card [CIF]
data_Co9Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.810
_cell_length_b   5.810
_cell_length_c   8.205
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.091
_symmetry_Int_Tables_number   1
_cell_volume   276.920
_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  0.249  0.500  0.127  1.0
  Co  Co1  1  0.751  0.500  0.127  1.0
  Co  Co2  1  0.000  0.251  0.373  1.0
  Co  Co3  1  1.000  0.749  0.373  1.0
  Co  Co4  1  0.752  0.000  0.622  1.0
  Co  Co5  1  0.248  1.000  0.622  1.0
  Co  Co6  1  0.000  0.500  0.750  1.0
  Co  Co7  1  0.500  0.252  0.878  1.0
  Co  Co8  1  0.500  0.748  0.878  1.0
  Cu  Cu9  1  0.000  0.000  0.001  1.0
  Cu  Cu10  1  0.500  0.000  0.250  1.0
  Cu  Cu11  1  0.500  0.500  0.499  1.0
  O  O12  1  0.496  0.719  0.114  1.0
  O  O13  1  0.504  0.281  0.114  1.0
  O  O14  1  0.003  0.280  0.141  1.0
  O  O15  1  0.997  0.720  0.141  1.0
  O  O16  1  0.780  0.503  0.359  1.0
  O  O17  1  0.220  0.497  0.359  1.0
  O  O18  1  0.781  0.004  0.386  1.0
  O  O19  1  0.219  0.996  0.386  1.0
  O  O20  1  0.996  0.230  0.609  1.0
  O  O21  1  0.004  0.770  0.609  1.0
  O  O22  1  0.496  0.230  0.637  1.0
  O  O23  1  0.504  0.770  0.637  1.0
  O  O24  1  0.730  0.996  0.863  1.0
  O  O25  1  0.270  0.004  0.863  1.0
  O  O26  1  0.270  0.504  0.891  1.0
  O  O27  1  0.730  0.496  0.891  1.0
[/CIF]
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The material structure described by Co9Cu3O16 is Spinel-like structured and crystallizes in the orthorhombic C222 space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), two equivalent O(1), and three equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, corners with three equivalent Cu(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), two equivalent O(3), and three equivalent O(4) atoms to form CoO6 octahedra that share  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Cu(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. In the third Co site, Co(3) is bonded to four equivalent O(3) atoms to form corner-sharing CoO4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-60°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form CuO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the second Cu site, Cu(2) is bonded to four equivalent O(1) atoms to form CuO4 tetrahedra that share corners with four equivalent Co(2)O6 octahedra and corners with eight equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. There are four inequivalent O sites. In the first O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(3), and two equivalent Co(2) atoms. In the second O site, O(4) is bonded to three equivalent Co(2) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCo3Cu trigonal pyramids. In the third O site, O(1) is bonded to one Co(2), two equivalent Co(1), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OCo3Cu tetrahedra. In the fourth O site, O(2) is bonded to three equivalent Co(1) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCo3Cu trigonal pyramids. is represented by the CIF card [CIF]
data_Co9Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.810
_cell_length_b   5.810
_cell_length_c   8.205
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.091
_symmetry_Int_Tables_number   1
_cell_volume   276.920
_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  0.249  0.500  0.127  1.0
  Co  Co1  1  0.751  0.500  0.127  1.0
  Co  Co2  1  0.000  0.251  0.373  1.0
  Co  Co3  1  1.000  0.749  0.373  1.0
  Co  Co4  1  0.752  0.000  0.622  1.0
  Co  Co5  1  0.248  1.000  0.622  1.0
  Co  Co6  1  0.000  0.500  0.750  1.0
  Co  Co7  1  0.500  0.252  0.878  1.0
  Co  Co8  1  0.500  0.748  0.878  1.0
  Cu  Cu9  1  0.000  0.000  0.001  1.0
  Cu  Cu10  1  0.500  0.000  0.250  1.0
  Cu  Cu11  1  0.500  0.500  0.499  1.0
  O  O12  1  0.496  0.719  0.114  1.0
  O  O13  1  0.504  0.281  0.114  1.0
  O  O14  1  0.003  0.280  0.141  1.0
  O  O15  1  0.997  0.720  0.141  1.0
  O  O16  1  0.780  0.503  0.359  1.0
  O  O17  1  0.220  0.497  0.359  1.0
  O  O18  1  0.781  0.004  0.386  1.0
  O  O19  1  0.219  0.996  0.386  1.0
  O  O20  1  0.996  0.230  0.609  1.0
  O  O21  1  0.004  0.770  0.609  1.0
  O  O22  1  0.496  0.230  0.637  1.0
  O  O23  1  0.504  0.770  0.637  1.0
  O  O24  1  0.730  0.996  0.863  1.0
  O  O25  1  0.270  0.004  0.863  1.0
  O  O26  1  0.270  0.504  0.891  1.0
  O  O27  1  0.730  0.496  0.891  1.0
[/CIF]
.