The material described by Li4Nb2Fe3Cu3O16 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, and corners with three equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-63°. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with three equivalent Nb(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with three equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form distorted NbO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(3)O4 tetrahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. In the second Nb site, Nb(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form NbO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form FeO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Cu(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-51°. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form FeO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Cu(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Cu site, Cu(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form CuO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(2), and one Cu(3) atom. In the second O site, O(2) is bonded to one Li(4), one Nb(1), one Cu(1), and one Cu(2) atom to form distorted OLiNbCu2 tetrahedra that share  a cornercorner with one O(7)LiNbFeCu tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(7)LiNbFeCu tetrahedra,  an edgeedge with one O(8)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the third O site, O(3) is bonded to one Li(1), one Fe(1), one Cu(1), and one Cu(2) atom to form distorted OLiFeCu2 trigonal pyramids that share  a cornercorner with one O(15)LiNbFe2 tetrahedra,  a cornercorner with one O(12)LiNbFeCu tetrahedra, corners with three equivalent O(4)LiFeCu2 tetrahedra,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(7)LiNbFeCu tetrahedra, and  an edgeedge with one O(8)LiNbFeCu tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Fe(1), one Cu(1), and one Cu(2) atom to form OLiFeCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra, corners with two equivalent O(7)LiNbFeCu tetrahedra, corners with two equivalent O(8)LiNbFeCu tetrahedra, and corners with three equivalent O(3)LiFeCu2 trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(2), one Fe(2), one Fe(3), and one Cu(3) atom to form OLiFe2Cu tetrahedra that share corners with two equivalent O(15)LiNbFe2 tetrahedra, corners with two equivalent O(12)LiNbFeCu tetrahedra, and corners with three equivalent O(13)LiFe2Cu trigonal pyramids. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded to one Li(4), one Nb(1), one Fe(1), and one Cu(1) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(8)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the eighth O site, O(8) is bonded to one Li(4), one Nb(1), one Fe(1), and one Cu(2) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(7)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(7)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(2), and one Fe(3) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Nb(2), one Fe(2), and one Cu(3) atom. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Fe(3), and one Cu(3) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(15)LiNbFe2 tetrahedra, corners with two equivalent O(5)LiFe2Cu tetrahedra,  a cornercorner with one O(3)LiFeCu2 trigonal pyramid,  an edgeedge with one O(15)LiNbFe2 tetrahedra, and  an edgeedge with one O(13)LiFe2Cu trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Li(4), one Fe(2), one Fe(3), and one Cu(3) atom to form distorted OLiFe2Cu trigonal pyramids that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(7)LiNbFeCu tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with three equivalent O(5)LiFe2Cu tetrahedra,  an edgeedge with one O(15)LiNbFe2 tetrahedra, and  an edgeedge with one O(12)LiNbFeCu tetrahedra. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Fe(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe2 tetrahedra that share  a cornercorner with one O(12)LiNbFeCu tetrahedra, corners with two equivalent O(5)LiFe2Cu tetrahedra,  a cornercorner with one O(3)LiFeCu2 trigonal pyramid,  an edgeedge with one O(12)LiNbFeCu tetrahedra, and  an edgeedge with one O(13)LiFe2Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Fe(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Nb2Fe3Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.947
_cell_length_b   5.965
_cell_length_c   9.736
_cell_angle_alpha   89.862
_cell_angle_beta   89.718
_cell_angle_gamma   120.010
_symmetry_Int_Tables_number   1
_cell_volume   299.047
_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
  Li  Li0  1  0.327  0.664  0.905  1.0
  Li  Li1  1  0.013  0.007  0.992  1.0
  Li  Li2  1  0.010  0.005  0.490  1.0
  Li  Li3  1  0.656  0.328  0.400  1.0
  Nb  Nb4  1  0.338  0.669  0.496  1.0
  Nb  Nb5  1  0.666  0.335  0.996  1.0
  Fe  Fe6  1  0.658  0.830  0.215  1.0
  Fe  Fe7  1  0.831  0.658  0.718  1.0
  Fe  Fe8  1  0.831  0.172  0.718  1.0
  Cu  Cu9  1  0.169  0.829  0.216  1.0
  Cu  Cu10  1  0.169  0.340  0.215  1.0
  Cu  Cu11  1  0.343  0.172  0.715  1.0
  O  O12  1  0.156  0.820  0.586  1.0
  O  O13  1  0.036  0.518  0.341  1.0
  O  O14  1  0.326  0.663  0.112  1.0
  O  O15  1  0.003  0.001  0.303  1.0
  O  O16  1  0.009  0.004  0.803  1.0
  O  O17  1  0.160  0.334  0.588  1.0
  O  O18  1  0.481  0.961  0.343  1.0
  O  O19  1  0.481  0.519  0.343  1.0
  O  O20  1  0.337  0.168  0.093  1.0
  O  O21  1  0.665  0.833  0.593  1.0
  O  O22  1  0.524  0.488  0.847  1.0
  O  O23  1  0.521  0.038  0.846  1.0
  O  O24  1  0.661  0.331  0.611  1.0
  O  O25  1  0.831  0.668  0.090  1.0
  O  O26  1  0.966  0.482  0.842  1.0
  O  O27  1  0.830  0.163  0.090  1.0
[/CIF]
.
The material described by Li4Nb2Fe3Cu3O16 is Spinel-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(11), one O(12), one O(15), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, and corners with three equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-63°. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with three equivalent Nb(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. In the fourth Li site, Li(4) is bonded to one O(13), one O(2), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with three equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(10), one O(2), one O(6), one O(7), and one O(8) atom to form distorted NbO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(3)O4 tetrahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Cu(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-55°. In the second Nb site, Nb(2) is bonded to one O(11), one O(12), one O(14), one O(15), one O(16), and one O(9) atom to form NbO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(14), one O(16), one O(3), one O(4), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(13), one O(15), and one O(5) atom to form FeO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Cu(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-51°. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(13), one O(15), one O(5), and one O(6) atom to form FeO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Cu(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(14), one O(2), one O(3), one O(4), one O(7), and one O(9) atom to form CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Cu site, Cu(2) is bonded to one O(16), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(13), one O(5), and one O(6) atom to form CuO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra,  an edgeedge with one Nb(2)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(2), and one Cu(3) atom. In the second O site, O(2) is bonded to one Li(4), one Nb(1), one Cu(1), and one Cu(2) atom to form distorted OLiNbCu2 tetrahedra that share  a cornercorner with one O(7)LiNbFeCu tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(7)LiNbFeCu tetrahedra,  an edgeedge with one O(8)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the third O site, O(3) is bonded to one Li(1), one Fe(1), one Cu(1), and one Cu(2) atom to form distorted OLiFeCu2 trigonal pyramids that share  a cornercorner with one O(15)LiNbFe2 tetrahedra,  a cornercorner with one O(12)LiNbFeCu tetrahedra, corners with three equivalent O(4)LiFeCu2 tetrahedra,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(7)LiNbFeCu tetrahedra, and  an edgeedge with one O(8)LiNbFeCu tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Fe(1), one Cu(1), and one Cu(2) atom to form OLiFeCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra, corners with two equivalent O(7)LiNbFeCu tetrahedra, corners with two equivalent O(8)LiNbFeCu tetrahedra, and corners with three equivalent O(3)LiFeCu2 trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(2), one Fe(2), one Fe(3), and one Cu(3) atom to form OLiFe2Cu tetrahedra that share corners with two equivalent O(15)LiNbFe2 tetrahedra, corners with two equivalent O(12)LiNbFeCu tetrahedra, and corners with three equivalent O(13)LiFe2Cu trigonal pyramids. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded to one Li(4), one Nb(1), one Fe(1), and one Cu(1) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(8)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the eighth O site, O(8) is bonded to one Li(4), one Nb(1), one Fe(1), and one Cu(2) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(7)LiNbFeCu tetrahedra, corners with two equivalent O(4)LiFeCu2 tetrahedra,  a cornercorner with one O(13)LiFe2Cu trigonal pyramid,  an edgeedge with one O(2)LiNbCu2 tetrahedra,  an edgeedge with one O(7)LiNbFeCu tetrahedra, and  an edgeedge with one O(3)LiFeCu2 trigonal pyramid. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Cu(1), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(1), one Fe(2), and one Fe(3) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Nb(2), one Fe(2), and one Cu(3) atom. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Fe(3), and one Cu(3) atom to form distorted OLiNbFeCu tetrahedra that share  a cornercorner with one O(15)LiNbFe2 tetrahedra, corners with two equivalent O(5)LiFe2Cu tetrahedra,  a cornercorner with one O(3)LiFeCu2 trigonal pyramid,  an edgeedge with one O(15)LiNbFe2 tetrahedra, and  an edgeedge with one O(13)LiFe2Cu trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Li(4), one Fe(2), one Fe(3), and one Cu(3) atom to form distorted OLiFe2Cu trigonal pyramids that share  a cornercorner with one O(2)LiNbCu2 tetrahedra,  a cornercorner with one O(7)LiNbFeCu tetrahedra,  a cornercorner with one O(8)LiNbFeCu tetrahedra, corners with three equivalent O(5)LiFe2Cu tetrahedra,  an edgeedge with one O(15)LiNbFe2 tetrahedra, and  an edgeedge with one O(12)LiNbFeCu tetrahedra. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Fe(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Fe(2), and one Fe(3) atom to form distorted OLiNbFe2 tetrahedra that share  a cornercorner with one O(12)LiNbFeCu tetrahedra, corners with two equivalent O(5)LiFe2Cu tetrahedra,  a cornercorner with one O(3)LiFeCu2 trigonal pyramid,  an edgeedge with one O(12)LiNbFeCu tetrahedra, and  an edgeedge with one O(13)LiFe2Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(2), one Fe(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Nb2Fe3Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.947
_cell_length_b   5.965
_cell_length_c   9.736
_cell_angle_alpha   89.862
_cell_angle_beta   89.718
_cell_angle_gamma   120.010
_symmetry_Int_Tables_number   1
_cell_volume   299.047
_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
  Li  Li0  1  0.327  0.664  0.905  1.0
  Li  Li1  1  0.013  0.007  0.992  1.0
  Li  Li2  1  0.010  0.005  0.490  1.0
  Li  Li3  1  0.656  0.328  0.400  1.0
  Nb  Nb4  1  0.338  0.669  0.496  1.0
  Nb  Nb5  1  0.666  0.335  0.996  1.0
  Fe  Fe6  1  0.658  0.830  0.215  1.0
  Fe  Fe7  1  0.831  0.658  0.718  1.0
  Fe  Fe8  1  0.831  0.172  0.718  1.0
  Cu  Cu9  1  0.169  0.829  0.216  1.0
  Cu  Cu10  1  0.169  0.340  0.215  1.0
  Cu  Cu11  1  0.343  0.172  0.715  1.0
  O  O12  1  0.156  0.820  0.586  1.0
  O  O13  1  0.036  0.518  0.341  1.0
  O  O14  1  0.326  0.663  0.112  1.0
  O  O15  1  0.003  0.001  0.303  1.0
  O  O16  1  0.009  0.004  0.803  1.0
  O  O17  1  0.160  0.334  0.588  1.0
  O  O18  1  0.481  0.961  0.343  1.0
  O  O19  1  0.481  0.519  0.343  1.0
  O  O20  1  0.337  0.168  0.093  1.0
  O  O21  1  0.665  0.833  0.593  1.0
  O  O22  1  0.524  0.488  0.847  1.0
  O  O23  1  0.521  0.038  0.846  1.0
  O  O24  1  0.661  0.331  0.611  1.0
  O  O25  1  0.831  0.668  0.090  1.0
  O  O26  1  0.966  0.482  0.842  1.0
  O  O27  1  0.830  0.163  0.090  1.0
[/CIF]
.