The structure described by Li4Nb2Cr3Cu3O16 is Hausmannite-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 Cr(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Cr(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 56-64°. 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 Cr(2)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Cr(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 57-67°. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(4), and one O(6) atom. 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 Cr(2)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Cr(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 55-63°. 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 Cr(2)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Cr(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 46-60°. 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 Cr(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 Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. There are three inequivalent Cr sites. In the first Cr site, Cr(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 CrO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)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 range from 40-41°. In the second Cr site, Cr(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 CrO6 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 Cr(3)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the third Cr site, Cr(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 CrO6 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 Cr(2)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. 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 distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cr(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 56°. 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 distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cr(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 are 56°. 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 Cr(2)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. The corner-sharing octahedral tilt angles are 60°. 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 Cr(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 corners with two equivalent O(4)LiCrCu2 tetrahedra,  a cornercorner with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(3)LiCrCu2 tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Cr(1), one Cu(1), and one Cu(2) atom to form OLiCrCu2 tetrahedra that share  a cornercorner with one O(15)LiNbCr2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with three equivalent O(4)LiCrCu2 tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid, and  an edgeedge with one O(2)LiNbCu2 tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Cr(1), one Cu(1), and one Cu(2) atom to form OLiCrCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra and corners with three equivalent O(3)LiCrCu2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Cr(2), one Cr(3), and one Cu(3) atom to form OLiCr2Cu tetrahedra that share corners with two equivalent O(15)LiNbCr2 tetrahedra, corners with two equivalent O(12)LiNbCrCu tetrahedra, corners with two equivalent O(11)LiNbCrCu trigonal pyramids, and corners with three equivalent O(13)LiCr2Cu 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 Cr(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Cr(1), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Cr(1), and one Cu(2) atom. 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 Cr(2), and one Cr(3) atom. In the eleventh O site, O(11) is bonded to one Li(1), one Nb(2), one Cr(2), and one Cu(3) atom to form distorted OLiNbCrCu trigonal pyramids that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(15)LiNbCr2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(12)LiNbCrCu tetrahedra, and  an edgeedge with one O(13)LiCr2Cu trigonal pyramid. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Cr(3), and one Cu(3) atom to form distorted OLiNbCrCu tetrahedra that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(15)LiNbCr2 tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Li(4), one Cr(2), one Cr(3), and one Cu(3) atom to form distorted OLiCr2Cu trigonal pyramids that share  a cornercorner with one O(2)LiNbCu2 tetrahedra, corners with three equivalent O(5)LiCr2Cu tetrahedra,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(12)LiNbCrCu tetrahedra, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Li(2), one Nb(2), one Cr(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Cr(2), and one Cr(3) atom to form distorted OLiNbCr2 tetrahedra that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid,  an edgeedge with one O(12)LiNbCrCu tetrahedra,  an edgeedge with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Li(2), one Nb(2), one Cr(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_Li4Nb2Cr3Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.997
_cell_length_b   5.846
_cell_length_c   9.773
_cell_angle_alpha   89.982
_cell_angle_beta   86.600
_cell_angle_gamma   119.160
_symmetry_Int_Tables_number   1
_cell_volume   298.502
_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  0.323  0.662  0.899  1.0
  Li  Li1  1  0.998  0.999  0.993  1.0
  Li  Li2  1  0.009  0.005  0.488  1.0
  Li  Li3  1  0.680  0.340  0.404  1.0
  Nb  Nb4  1  0.369  0.685  0.496  1.0
  Nb  Nb5  1  0.668  0.333  0.989  1.0
  Cr  Cr6  1  0.660  0.829  0.218  1.0
  Cr  Cr7  1  0.827  0.660  0.716  1.0
  Cr  Cr8  1  0.828  0.168  0.715  1.0
  Cu  Cu9  1  0.175  0.836  0.213  1.0
  Cu  Cu10  1  0.175  0.339  0.214  1.0
  Cu  Cu11  1  0.336  0.169  0.714  1.0
  O  O12  1  0.158  0.826  0.588  1.0
  O  O13  1  0.057  0.530  0.332  1.0
  O  O14  1  0.337  0.669  0.120  1.0
  O  O15  1  1.000  0.999  0.299  1.0
  O  O16  1  0.992  0.996  0.807  1.0
  O  O17  1  0.158  0.332  0.588  1.0
  O  O18  1  0.518  0.978  0.356  1.0
  O  O19  1  0.514  0.538  0.355  1.0
  O  O20  1  0.308  0.153  0.095  1.0
  O  O21  1  0.672  0.836  0.604  1.0
  O  O22  1  0.511  0.478  0.841  1.0
  O  O23  1  0.512  0.034  0.841  1.0
  O  O24  1  0.673  0.337  0.612  1.0
  O  O25  1  0.790  0.650  0.085  1.0
  O  O26  1  0.958  0.479  0.839  1.0
  O  O27  1  0.792  0.141  0.086  1.0
[/CIF]
.
The structure described by Li4Nb2Cr3Cu3O16 is Hausmannite-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 Cr(1)O6 octahedra,  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Cr(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 56-64°. 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 Cr(2)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  an edgeedge with one Cr(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 57-67°. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(4), and one O(6) atom. 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 Cr(2)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cu(3)O6 octahedra, corners with two equivalent Cr(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 55-63°. 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 Cr(2)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cu(3)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Cr(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 46-60°. 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 Cr(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 Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra, and  an edgeedge with one Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. There are three inequivalent Cr sites. In the first Cr site, Cr(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 CrO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)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 range from 40-41°. In the second Cr site, Cr(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 CrO6 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 Cr(3)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the third Cr site, Cr(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 CrO6 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 Cr(2)O6 octahedra, and edges with two equivalent Cu(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. 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 distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cr(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 56°. 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 distorted CuO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, edges with two equivalent Cr(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 are 56°. 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 Cr(2)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. The corner-sharing octahedral tilt angles are 60°. 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 Cr(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 corners with two equivalent O(4)LiCrCu2 tetrahedra,  a cornercorner with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(3)LiCrCu2 tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Cr(1), one Cu(1), and one Cu(2) atom to form OLiCrCu2 tetrahedra that share  a cornercorner with one O(15)LiNbCr2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with three equivalent O(4)LiCrCu2 tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid, and  an edgeedge with one O(2)LiNbCu2 tetrahedra. In the fourth O site, O(4) is bonded to one Li(3), one Cr(1), one Cu(1), and one Cu(2) atom to form OLiCrCu2 tetrahedra that share corners with two equivalent O(2)LiNbCu2 tetrahedra and corners with three equivalent O(3)LiCrCu2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Cr(2), one Cr(3), and one Cu(3) atom to form OLiCr2Cu tetrahedra that share corners with two equivalent O(15)LiNbCr2 tetrahedra, corners with two equivalent O(12)LiNbCrCu tetrahedra, corners with two equivalent O(11)LiNbCrCu trigonal pyramids, and corners with three equivalent O(13)LiCr2Cu 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 Cr(3), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Cr(1), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(4), one Nb(1), one Cr(1), and one Cu(2) atom. 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 Cr(2), and one Cr(3) atom. In the eleventh O site, O(11) is bonded to one Li(1), one Nb(2), one Cr(2), and one Cu(3) atom to form distorted OLiNbCrCu trigonal pyramids that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(15)LiNbCr2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(12)LiNbCrCu tetrahedra, and  an edgeedge with one O(13)LiCr2Cu trigonal pyramid. In the twelfth O site, O(12) is bonded to one Li(1), one Nb(2), one Cr(3), and one Cu(3) atom to form distorted OLiNbCrCu tetrahedra that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(15)LiNbCr2 tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the thirteenth O site, O(13) is bonded to one Li(4), one Cr(2), one Cr(3), and one Cu(3) atom to form distorted OLiCr2Cu trigonal pyramids that share  a cornercorner with one O(2)LiNbCu2 tetrahedra, corners with three equivalent O(5)LiCr2Cu tetrahedra,  an edgeedge with one O(15)LiNbCr2 tetrahedra,  an edgeedge with one O(12)LiNbCrCu tetrahedra, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Li(2), one Nb(2), one Cr(1), and one Cu(1) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Nb(2), one Cr(2), and one Cr(3) atom to form distorted OLiNbCr2 tetrahedra that share  a cornercorner with one O(3)LiCrCu2 tetrahedra,  a cornercorner with one O(12)LiNbCrCu tetrahedra, corners with two equivalent O(5)LiCr2Cu tetrahedra,  a cornercorner with one O(11)LiNbCrCu trigonal pyramid,  an edgeedge with one O(12)LiNbCrCu tetrahedra,  an edgeedge with one O(13)LiCr2Cu trigonal pyramid, and  an edgeedge with one O(11)LiNbCrCu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Li(2), one Nb(2), one Cr(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_Li4Nb2Cr3Cu3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.997
_cell_length_b   5.846
_cell_length_c   9.773
_cell_angle_alpha   89.982
_cell_angle_beta   86.600
_cell_angle_gamma   119.160
_symmetry_Int_Tables_number   1
_cell_volume   298.502
_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  0.323  0.662  0.899  1.0
  Li  Li1  1  0.998  0.999  0.993  1.0
  Li  Li2  1  0.009  0.005  0.488  1.0
  Li  Li3  1  0.680  0.340  0.404  1.0
  Nb  Nb4  1  0.369  0.685  0.496  1.0
  Nb  Nb5  1  0.668  0.333  0.989  1.0
  Cr  Cr6  1  0.660  0.829  0.218  1.0
  Cr  Cr7  1  0.827  0.660  0.716  1.0
  Cr  Cr8  1  0.828  0.168  0.715  1.0
  Cu  Cu9  1  0.175  0.836  0.213  1.0
  Cu  Cu10  1  0.175  0.339  0.214  1.0
  Cu  Cu11  1  0.336  0.169  0.714  1.0
  O  O12  1  0.158  0.826  0.588  1.0
  O  O13  1  0.057  0.530  0.332  1.0
  O  O14  1  0.337  0.669  0.120  1.0
  O  O15  1  1.000  0.999  0.299  1.0
  O  O16  1  0.992  0.996  0.807  1.0
  O  O17  1  0.158  0.332  0.588  1.0
  O  O18  1  0.518  0.978  0.356  1.0
  O  O19  1  0.514  0.538  0.355  1.0
  O  O20  1  0.308  0.153  0.095  1.0
  O  O21  1  0.672  0.836  0.604  1.0
  O  O22  1  0.511  0.478  0.841  1.0
  O  O23  1  0.512  0.034  0.841  1.0
  O  O24  1  0.673  0.337  0.612  1.0
  O  O25  1  0.790  0.650  0.085  1.0
  O  O26  1  0.958  0.479  0.839  1.0
  O  O27  1  0.792  0.141  0.086  1.0
[/CIF]
.