The crystal structure described by ZnCr2O4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are nine inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CrO6 octahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Cr(9)O4 tetrahedra, corners with two equivalent Cr(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Zn(3)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Cr(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-68°. In the third Cr site, Cr(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form CrO6 octahedra that share corners with three equivalent Cr(9)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(6)O6 octahedra. In the fourth Cr site, Cr(4) is bonded to one O(11), one O(12), one O(14), one O(4), one O(6), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one Cr(5)O4 tetrahedra,  a cornercorner with one Cr(7)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Zn(5)O6 octahedra. In the fifth Cr site, Cr(5) is bonded to one O(15), one O(6), and two equivalent O(10) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Cr(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the sixth Cr site, Cr(6) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form CrO6 octahedra that share  a cornercorner with one Cr(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Cr(5)O4 tetrahedra, corners with two equivalent Cr(9)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Cr(6)O6 octahedra, and edges with two equivalent Zn(6)O6 octahedra. In the seventh Cr site, Cr(7) is bonded to one O(14), one O(5), and two equivalent O(7) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-67°. In the eighth Cr site, Cr(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Cr(6)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Cr(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. In the ninth Cr site, Cr(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Cr(3)O6 octahedra, and corners with four equivalent Cr(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-66°. There are six inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(13), one O(3), and two equivalent O(1) atoms to form ZnO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Cr(6)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Cr(3)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the second Zn site, Zn(2) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(7) atoms to form ZnO6 octahedra that share corners with three equivalent Cr(2)O4 tetrahedra, corners with three equivalent Cr(7)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(4)O6 octahedra. In the third Zn site, Zn(3) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(7) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Cr(9)O4 tetrahedra, corners with two equivalent Cr(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. In the fourth Zn site, Zn(4) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(12) atoms to form ZnO6 octahedra that share corners with three equivalent Cr(5)O4 tetrahedra, corners with three equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Cr(6)O6 octahedra. In the fifth Zn site, Zn(5) is bonded to one O(14), one O(6), two equivalent O(12), and two equivalent O(4) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(5)O4 tetrahedra,  a cornercorner with one Cr(7)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Cr(4)O6 octahedra. In the sixth Zn site, Zn(6) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(17) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Cr(5)O4 tetrahedra, corners with two equivalent Cr(9)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Cr(6)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(3), one Zn(1), and one Zn(3) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(1), and one Zn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Cr(3), two equivalent Cr(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(2), one Cr(4), one Zn(2), and one Zn(5) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Cr(7), two equivalent Cr(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Cr(5), two equivalent Cr(4), and one Zn(5) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(7), one Zn(2), and one Zn(3) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Cr(9), two equivalent Cr(1), and one Zn(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(4), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Cr(5), one Cr(6), one Zn(4), and one Zn(6) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Cr(8), two equivalent Cr(4), and one Zn(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Cr(4), one Cr(8), one Zn(4), and one Zn(5) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to two equivalent Cr(6), one Zn(1), and one Zn(6) atom. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Cr(7), two equivalent Cr(4), and one Zn(5) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Cr(5), two equivalent Cr(6), and one Zn(4) atom. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(9), and two equivalent Cr(6) atoms. In the seventeenth O site, O(17) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(6), one Cr(9), and one Zn(6) atom. In the eighteenth O site, O(18) is bonded in a rectangular see-saw-like geometry to one Cr(8), two equivalent Cr(6), and one Zn(6) atom. is represented by the CIF card [CIF]
data_ZnCr2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.973
_cell_length_c   14.882
_cell_angle_alpha   86.706
_cell_angle_beta   86.706
_cell_angle_gamma   60.833
_symmetry_Int_Tables_number   1
_cell_volume   462.569
_cell_formula_units_Z   6
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
  Zn  Zn0  1  0.664  0.664  0.041  1.0
  Zn  Zn1  1  0.333  0.333  0.332  1.0
  Zn  Zn2  1  0.163  0.163  0.166  1.0
  Zn  Zn3  1  0.667  0.667  0.668  1.0
  Zn  Zn4  1  0.501  0.501  0.499  1.0
  Zn  Zn5  1  0.836  0.836  0.833  1.0
  Cr  Cr6  1  0.164  0.665  0.165  1.0
  Cr  Cr7  1  1.000  1.000  0.374  1.0
  Cr  Cr8  1  0.001  0.001  0.002  1.0
  Cr  Cr9  1  0.665  0.164  0.165  1.0
  Cr  Cr10  1  0.500  1.000  0.500  1.0
  Cr  Cr11  1  0.337  0.337  0.707  1.0
  Cr  Cr12  1  1.000  0.500  0.500  1.0
  Cr  Cr13  1  0.835  0.337  0.835  1.0
  Cr  Cr14  1  0.665  0.665  0.290  1.0
  Cr  Cr15  1  0.337  0.835  0.835  1.0
  Cr  Cr16  1  0.999  0.999  0.626  1.0
  Cr  Cr17  1  0.337  0.337  0.961  1.0
  O  O18  1  0.299  0.849  0.082  1.0
  O  O19  1  0.978  0.978  0.243  1.0
  O  O20  1  0.849  0.299  0.082  1.0
  O  O21  1  0.845  0.845  0.090  1.0
  O  O22  1  0.650  0.178  0.417  1.0
  O  O23  1  0.494  0.494  0.235  1.0
  O  O24  1  0.317  0.317  0.576  1.0
  O  O25  1  0.484  0.012  0.247  1.0
  O  O26  1  0.178  0.650  0.417  1.0
  O  O27  1  0.347  0.347  0.091  1.0
  O  O28  1  0.171  0.171  0.430  1.0
  O  O29  1  0.012  0.484  0.247  1.0
  O  O30  1  0.990  0.508  0.751  1.0
  O  O31  1  0.829  0.829  0.570  1.0
  O  O32  1  0.821  0.349  0.583  1.0
  O  O33  1  0.508  0.990  0.751  1.0
  O  O34  1  0.662  0.662  0.905  1.0
  O  O35  1  0.683  0.683  0.423  1.0
  O  O36  1  0.505  0.505  0.766  1.0
  O  O37  1  0.349  0.821  0.583  1.0
  O  O38  1  0.158  0.158  0.909  1.0
  O  O39  1  0.160  0.691  0.921  1.0
  O  O40  1  0.015  0.015  0.760  1.0
  O  O41  1  0.691  0.160  0.921  1.0
[/CIF]
.
The crystal structure described by ZnCr2O4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are nine inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CrO6 octahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Cr(9)O4 tetrahedra, corners with two equivalent Cr(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Zn(3)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Cr(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-68°. In the third Cr site, Cr(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form CrO6 octahedra that share corners with three equivalent Cr(9)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(6)O6 octahedra. In the fourth Cr site, Cr(4) is bonded to one O(11), one O(12), one O(14), one O(4), one O(6), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one Cr(5)O4 tetrahedra,  a cornercorner with one Cr(7)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Zn(5)O6 octahedra. In the fifth Cr site, Cr(5) is bonded to one O(15), one O(6), and two equivalent O(10) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Cr(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the sixth Cr site, Cr(6) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form CrO6 octahedra that share  a cornercorner with one Cr(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Cr(5)O4 tetrahedra, corners with two equivalent Cr(9)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Cr(6)O6 octahedra, and edges with two equivalent Zn(6)O6 octahedra. In the seventh Cr site, Cr(7) is bonded to one O(14), one O(5), and two equivalent O(7) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-67°. In the eighth Cr site, Cr(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Cr(6)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Cr(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. In the ninth Cr site, Cr(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form CrO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Cr(3)O6 octahedra, and corners with four equivalent Cr(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-66°. There are six inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(13), one O(3), and two equivalent O(1) atoms to form ZnO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Cr(6)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Cr(3)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the second Zn site, Zn(2) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(7) atoms to form ZnO6 octahedra that share corners with three equivalent Cr(2)O4 tetrahedra, corners with three equivalent Cr(7)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(4)O6 octahedra. In the third Zn site, Zn(3) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(7) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Cr(9)O4 tetrahedra, corners with two equivalent Cr(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with four equivalent Cr(1)O6 octahedra. In the fourth Zn site, Zn(4) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(12) atoms to form ZnO6 octahedra that share corners with three equivalent Cr(5)O4 tetrahedra, corners with three equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Cr(6)O6 octahedra. In the fifth Zn site, Zn(5) is bonded to one O(14), one O(6), two equivalent O(12), and two equivalent O(4) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(5)O4 tetrahedra,  a cornercorner with one Cr(7)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Cr(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Cr(4)O6 octahedra. In the sixth Zn site, Zn(6) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(17) atoms to form ZnO6 octahedra that share  a cornercorner with one Cr(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Cr(5)O4 tetrahedra, corners with two equivalent Cr(9)O4 tetrahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Cr(6)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(3), one Zn(1), and one Zn(3) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(1), and one Zn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Cr(3), two equivalent Cr(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(2), one Cr(4), one Zn(2), and one Zn(5) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Cr(7), two equivalent Cr(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Cr(5), two equivalent Cr(4), and one Zn(5) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(7), one Zn(2), and one Zn(3) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Cr(9), two equivalent Cr(1), and one Zn(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(4), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Cr(5), one Cr(6), one Zn(4), and one Zn(6) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Cr(8), two equivalent Cr(4), and one Zn(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Cr(4), one Cr(8), one Zn(4), and one Zn(5) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to two equivalent Cr(6), one Zn(1), and one Zn(6) atom. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Cr(7), two equivalent Cr(4), and one Zn(5) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Cr(5), two equivalent Cr(6), and one Zn(4) atom. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(9), and two equivalent Cr(6) atoms. In the seventeenth O site, O(17) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(6), one Cr(9), and one Zn(6) atom. In the eighteenth O site, O(18) is bonded in a rectangular see-saw-like geometry to one Cr(8), two equivalent Cr(6), and one Zn(6) atom. is represented by the CIF card [CIF]
data_ZnCr2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.973
_cell_length_c   14.882
_cell_angle_alpha   86.706
_cell_angle_beta   86.706
_cell_angle_gamma   60.833
_symmetry_Int_Tables_number   1
_cell_volume   462.569
_cell_formula_units_Z   6
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
  Zn  Zn0  1  0.664  0.664  0.041  1.0
  Zn  Zn1  1  0.333  0.333  0.332  1.0
  Zn  Zn2  1  0.163  0.163  0.166  1.0
  Zn  Zn3  1  0.667  0.667  0.668  1.0
  Zn  Zn4  1  0.501  0.501  0.499  1.0
  Zn  Zn5  1  0.836  0.836  0.833  1.0
  Cr  Cr6  1  0.164  0.665  0.165  1.0
  Cr  Cr7  1  1.000  1.000  0.374  1.0
  Cr  Cr8  1  0.001  0.001  0.002  1.0
  Cr  Cr9  1  0.665  0.164  0.165  1.0
  Cr  Cr10  1  0.500  1.000  0.500  1.0
  Cr  Cr11  1  0.337  0.337  0.707  1.0
  Cr  Cr12  1  1.000  0.500  0.500  1.0
  Cr  Cr13  1  0.835  0.337  0.835  1.0
  Cr  Cr14  1  0.665  0.665  0.290  1.0
  Cr  Cr15  1  0.337  0.835  0.835  1.0
  Cr  Cr16  1  0.999  0.999  0.626  1.0
  Cr  Cr17  1  0.337  0.337  0.961  1.0
  O  O18  1  0.299  0.849  0.082  1.0
  O  O19  1  0.978  0.978  0.243  1.0
  O  O20  1  0.849  0.299  0.082  1.0
  O  O21  1  0.845  0.845  0.090  1.0
  O  O22  1  0.650  0.178  0.417  1.0
  O  O23  1  0.494  0.494  0.235  1.0
  O  O24  1  0.317  0.317  0.576  1.0
  O  O25  1  0.484  0.012  0.247  1.0
  O  O26  1  0.178  0.650  0.417  1.0
  O  O27  1  0.347  0.347  0.091  1.0
  O  O28  1  0.171  0.171  0.430  1.0
  O  O29  1  0.012  0.484  0.247  1.0
  O  O30  1  0.990  0.508  0.751  1.0
  O  O31  1  0.829  0.829  0.570  1.0
  O  O32  1  0.821  0.349  0.583  1.0
  O  O33  1  0.508  0.990  0.751  1.0
  O  O34  1  0.662  0.662  0.905  1.0
  O  O35  1  0.683  0.683  0.423  1.0
  O  O36  1  0.505  0.505  0.766  1.0
  O  O37  1  0.349  0.821  0.583  1.0
  O  O38  1  0.158  0.158  0.909  1.0
  O  O39  1  0.160  0.691  0.921  1.0
  O  O40  1  0.015  0.015  0.760  1.0
  O  O41  1  0.691  0.160  0.921  1.0
[/CIF]
.