The structure described by Fe9Cu3O16 is Spinel-like structured and crystallizes in the orthorhombic Pmm2 space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and two equivalent O(7) atoms to form corner-sharing FeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Fe site, Fe(2) is bonded to one O(3), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one Cu(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. In the third Fe site, Fe(3) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Cu(3)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(4), one O(7), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, corners with two equivalent Cu(3)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(6), two equivalent O(7), and two equivalent O(8) atoms to form FeO6 octahedra that share  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Cu(3)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and corners with four equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Cu site, Cu(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, and corners with four equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the third Cu site, Cu(3) is bonded to two equivalent O(5) and two equivalent O(8) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(4)O6 octahedra, and corners with four equivalent Fe(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Fe(5), two equivalent Fe(2), and one Cu(1) atom to form distorted OFe3Cu trigonal pyramids that share corners with two equivalent O(3)Fe3Cu tetrahedra,  a cornercorner with one O(1)Fe3Cu trigonal pyramid,  a cornercorner with one O(6)Fe3Cu trigonal pyramid, corners with two equivalent O(4)Fe3Cu trigonal pyramids, corners with two equivalent O(7)Fe4 trigonal pyramids,  an edgeedge with one O(1)Fe3Cu trigonal pyramid, and edges with two equivalent O(8)Fe3Cu trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), and two equivalent Fe(2) atoms. In the third O site, O(3) is bonded to one Fe(2), two equivalent Fe(3), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OFe3Cu tetrahedra. In the fourth O site, O(4) is bonded to one Fe(4), two equivalent Fe(3), and one Cu(1) atom to form distorted OFe3Cu trigonal pyramids that share corners with four equivalent O(3)Fe3Cu tetrahedra,  a cornercorner with one O(4)Fe3Cu trigonal pyramid,  a cornercorner with one O(7)Fe4 trigonal pyramid, corners with two equivalent O(1)Fe3Cu trigonal pyramids, corners with two equivalent O(6)Fe3Cu trigonal pyramids, edges with two equivalent O(5)Fe3Cu tetrahedra, and  an edgeedge with one O(4)Fe3Cu trigonal pyramid. In the fifth O site, O(5) is bonded to one Fe(3), two equivalent Fe(4), and one Cu(3) atom to form distorted OFe3Cu tetrahedra that share  a cornercorner with one O(5)Fe3Cu tetrahedra, corners with two equivalent O(3)Fe3Cu tetrahedra, corners with two equivalent O(8)Fe3Cu trigonal pyramids, corners with two equivalent O(7)Fe4 trigonal pyramids, corners with four equivalent O(6)Fe3Cu trigonal pyramids,  an edgeedge with one O(5)Fe3Cu tetrahedra, and edges with two equivalent O(4)Fe3Cu trigonal pyramids. In the sixth O site, O(6) is bonded to one Fe(5), two equivalent Fe(4), and one Cu(2) atom to form distorted OFe3Cu trigonal pyramids that share corners with two equivalent O(3)Fe3Cu tetrahedra, corners with four equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(1)Fe3Cu trigonal pyramid,  a cornercorner with one O(6)Fe3Cu trigonal pyramid, corners with two equivalent O(4)Fe3Cu trigonal pyramids, corners with two equivalent O(8)Fe3Cu trigonal pyramids,  an edgeedge with one O(6)Fe3Cu trigonal pyramid, and edges with two equivalent O(7)Fe4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Fe(1), one Fe(4), and two equivalent Fe(5) atoms to form distorted OFe4 trigonal pyramids that share corners with two equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(4)Fe3Cu trigonal pyramid,  a cornercorner with one O(7)Fe4 trigonal pyramid, corners with two equivalent O(1)Fe3Cu trigonal pyramids, corners with four equivalent O(8)Fe3Cu trigonal pyramids,  an edgeedge with one O(7)Fe4 trigonal pyramid, and edges with two equivalent O(6)Fe3Cu trigonal pyramids. In the eighth O site, O(8) is bonded to one Fe(2), two equivalent Fe(5), and one Cu(3) atom to form distorted OFe3Cu trigonal pyramids that share  a cornercorner with one O(3)Fe3Cu tetrahedra, corners with two equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(8)Fe3Cu trigonal pyramid, corners with two equivalent O(6)Fe3Cu trigonal pyramids, corners with four equivalent O(7)Fe4 trigonal pyramids,  an edgeedge with one O(8)Fe3Cu trigonal pyramid, and edges with two equivalent O(1)Fe3Cu trigonal pyramids. is represented by the CIF file [CIF]
data_Fe9Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.857
_cell_length_b   5.879
_cell_length_c   8.339
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   287.162
_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
  Fe  Fe0  1  0.500  0.500  0.998  1.0
  Fe  Fe1  1  0.754  0.000  0.123  1.0
  Fe  Fe2  1  0.246  0.000  0.123  1.0
  Fe  Fe3  1  0.500  0.753  0.378  1.0
  Fe  Fe4  1  0.500  0.247  0.378  1.0
  Fe  Fe5  1  0.250  0.500  0.626  1.0
  Fe  Fe6  1  0.750  0.500  0.626  1.0
  Fe  Fe7  1  0.000  0.755  0.876  1.0
  Fe  Fe8  1  0.000  0.245  0.876  1.0
  Cu  Cu9  1  0.000  0.500  0.253  1.0
  Cu  Cu10  1  0.000  0.000  0.502  1.0
  Cu  Cu11  1  0.500  0.000  0.747  1.0
  O  O12  1  0.000  0.226  0.109  1.0
  O  O13  1  0.000  0.774  0.109  1.0
  O  O14  1  0.500  0.770  0.128  1.0
  O  O15  1  0.500  0.230  0.128  1.0
  O  O16  1  0.727  0.000  0.357  1.0
  O  O17  1  0.273  0.000  0.357  1.0
  O  O18  1  0.272  0.500  0.391  1.0
  O  O19  1  0.728  0.500  0.391  1.0
  O  O20  1  0.500  0.278  0.611  1.0
  O  O21  1  0.500  0.722  0.611  1.0
  O  O22  1  0.000  0.726  0.642  1.0
  O  O23  1  0.000  0.274  0.642  1.0
  O  O24  1  0.230  0.500  0.866  1.0
  O  O25  1  0.770  0.500  0.866  1.0
  O  O26  1  0.779  0.000  0.888  1.0
  O  O27  1  0.221  0.000  0.888  1.0
[/CIF]
.
The structure described by Fe9Cu3O16 is Spinel-like structured and crystallizes in the orthorhombic Pmm2 space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and two equivalent O(7) atoms to form corner-sharing FeO4 tetrahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Fe site, Fe(2) is bonded to one O(3), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Cu(2)O4 tetrahedra,  a cornercorner with one Cu(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. In the third Fe site, Fe(3) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Cu(3)O4 tetrahedra, corners with two equivalent Cu(1)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(4), one O(7), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Cu(1)O4 tetrahedra, corners with two equivalent Cu(2)O4 tetrahedra, corners with two equivalent Cu(3)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(6), two equivalent O(7), and two equivalent O(8) atoms to form FeO6 octahedra that share  a cornercorner with one Cu(1)O4 tetrahedra,  a cornercorner with one Cu(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Cu(3)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and corners with four equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Cu site, Cu(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, and corners with four equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. In the third Cu site, Cu(3) is bonded to two equivalent O(5) and two equivalent O(8) atoms to form CuO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(4)O6 octahedra, and corners with four equivalent Fe(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Fe(5), two equivalent Fe(2), and one Cu(1) atom to form distorted OFe3Cu trigonal pyramids that share corners with two equivalent O(3)Fe3Cu tetrahedra,  a cornercorner with one O(1)Fe3Cu trigonal pyramid,  a cornercorner with one O(6)Fe3Cu trigonal pyramid, corners with two equivalent O(4)Fe3Cu trigonal pyramids, corners with two equivalent O(7)Fe4 trigonal pyramids,  an edgeedge with one O(1)Fe3Cu trigonal pyramid, and edges with two equivalent O(8)Fe3Cu trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), and two equivalent Fe(2) atoms. In the third O site, O(3) is bonded to one Fe(2), two equivalent Fe(3), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OFe3Cu tetrahedra. In the fourth O site, O(4) is bonded to one Fe(4), two equivalent Fe(3), and one Cu(1) atom to form distorted OFe3Cu trigonal pyramids that share corners with four equivalent O(3)Fe3Cu tetrahedra,  a cornercorner with one O(4)Fe3Cu trigonal pyramid,  a cornercorner with one O(7)Fe4 trigonal pyramid, corners with two equivalent O(1)Fe3Cu trigonal pyramids, corners with two equivalent O(6)Fe3Cu trigonal pyramids, edges with two equivalent O(5)Fe3Cu tetrahedra, and  an edgeedge with one O(4)Fe3Cu trigonal pyramid. In the fifth O site, O(5) is bonded to one Fe(3), two equivalent Fe(4), and one Cu(3) atom to form distorted OFe3Cu tetrahedra that share  a cornercorner with one O(5)Fe3Cu tetrahedra, corners with two equivalent O(3)Fe3Cu tetrahedra, corners with two equivalent O(8)Fe3Cu trigonal pyramids, corners with two equivalent O(7)Fe4 trigonal pyramids, corners with four equivalent O(6)Fe3Cu trigonal pyramids,  an edgeedge with one O(5)Fe3Cu tetrahedra, and edges with two equivalent O(4)Fe3Cu trigonal pyramids. In the sixth O site, O(6) is bonded to one Fe(5), two equivalent Fe(4), and one Cu(2) atom to form distorted OFe3Cu trigonal pyramids that share corners with two equivalent O(3)Fe3Cu tetrahedra, corners with four equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(1)Fe3Cu trigonal pyramid,  a cornercorner with one O(6)Fe3Cu trigonal pyramid, corners with two equivalent O(4)Fe3Cu trigonal pyramids, corners with two equivalent O(8)Fe3Cu trigonal pyramids,  an edgeedge with one O(6)Fe3Cu trigonal pyramid, and edges with two equivalent O(7)Fe4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Fe(1), one Fe(4), and two equivalent Fe(5) atoms to form distorted OFe4 trigonal pyramids that share corners with two equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(4)Fe3Cu trigonal pyramid,  a cornercorner with one O(7)Fe4 trigonal pyramid, corners with two equivalent O(1)Fe3Cu trigonal pyramids, corners with four equivalent O(8)Fe3Cu trigonal pyramids,  an edgeedge with one O(7)Fe4 trigonal pyramid, and edges with two equivalent O(6)Fe3Cu trigonal pyramids. In the eighth O site, O(8) is bonded to one Fe(2), two equivalent Fe(5), and one Cu(3) atom to form distorted OFe3Cu trigonal pyramids that share  a cornercorner with one O(3)Fe3Cu tetrahedra, corners with two equivalent O(5)Fe3Cu tetrahedra,  a cornercorner with one O(8)Fe3Cu trigonal pyramid, corners with two equivalent O(6)Fe3Cu trigonal pyramids, corners with four equivalent O(7)Fe4 trigonal pyramids,  an edgeedge with one O(8)Fe3Cu trigonal pyramid, and edges with two equivalent O(1)Fe3Cu trigonal pyramids. is represented by the CIF file [CIF]
data_Fe9Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.857
_cell_length_b   5.879
_cell_length_c   8.339
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   287.162
_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
  Fe  Fe0  1  0.500  0.500  0.998  1.0
  Fe  Fe1  1  0.754  0.000  0.123  1.0
  Fe  Fe2  1  0.246  0.000  0.123  1.0
  Fe  Fe3  1  0.500  0.753  0.378  1.0
  Fe  Fe4  1  0.500  0.247  0.378  1.0
  Fe  Fe5  1  0.250  0.500  0.626  1.0
  Fe  Fe6  1  0.750  0.500  0.626  1.0
  Fe  Fe7  1  0.000  0.755  0.876  1.0
  Fe  Fe8  1  0.000  0.245  0.876  1.0
  Cu  Cu9  1  0.000  0.500  0.253  1.0
  Cu  Cu10  1  0.000  0.000  0.502  1.0
  Cu  Cu11  1  0.500  0.000  0.747  1.0
  O  O12  1  0.000  0.226  0.109  1.0
  O  O13  1  0.000  0.774  0.109  1.0
  O  O14  1  0.500  0.770  0.128  1.0
  O  O15  1  0.500  0.230  0.128  1.0
  O  O16  1  0.727  0.000  0.357  1.0
  O  O17  1  0.273  0.000  0.357  1.0
  O  O18  1  0.272  0.500  0.391  1.0
  O  O19  1  0.728  0.500  0.391  1.0
  O  O20  1  0.500  0.278  0.611  1.0
  O  O21  1  0.500  0.722  0.611  1.0
  O  O22  1  0.000  0.726  0.642  1.0
  O  O23  1  0.000  0.274  0.642  1.0
  O  O24  1  0.230  0.500  0.866  1.0
  O  O25  1  0.770  0.500  0.866  1.0
  O  O26  1  0.779  0.000  0.888  1.0
  O  O27  1  0.221  0.000  0.888  1.0
[/CIF]
.