The structure described by Zn(NiO2)2 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are nine inequivalent Ni sites. In the first Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(9)O4 tetrahedra, corners with two equivalent Ni(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Zn(3)O6 octahedra. In the second Ni site, Ni(2) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. In the third Ni site, Ni(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form NiO6 octahedra that share corners with three equivalent Ni(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 Ni(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. In the fourth Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(5)O4 tetrahedra,  a cornercorner with one Ni(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Zn(5)O6 octahedra. In the fifth Ni site, Ni(5) is bonded to one O(15), one O(6), and two equivalent O(10) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. In the sixth Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, corners with two equivalent Ni(9)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Ni(6)O6 octahedra, and edges with two equivalent Zn(6)O6 octahedra. In the seventh Ni site, Ni(7) is bonded to one O(14), one O(5), and two equivalent O(7) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-61°. In the eighth Ni site, Ni(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the ninth Ni site, Ni(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra, and corners with four equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-63°. 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 Ni(6)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra, and corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-62°. 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 Ni(2)O4 tetrahedra, corners with three equivalent Ni(7)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(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 Ni(2)O4 tetrahedra,  a cornercorner with one Ni(9)O4 tetrahedra, corners with two equivalent Ni(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with four equivalent Ni(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 Ni(5)O4 tetrahedra, corners with three equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(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 Ni(5)O4 tetrahedra,  a cornercorner with one Ni(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Ni(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 Ni(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, corners with two equivalent Ni(9)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Ni(6)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded to one Ni(1), one Ni(3), one Zn(1), and one Zn(3) atom to form a mixture of distorted corner and edge-sharing OZn2Ni2 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ni(2), two equivalent Ni(1), and one Zn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Ni(3), two equivalent Ni(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Ni(2), one Ni(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 Ni(7), two equivalent Ni(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Ni(5), two equivalent Ni(4), and one Zn(5) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Ni(1), one Ni(7), one Zn(2), and one Zn(3) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Ni(9), two equivalent Ni(1), and one Zn(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Ni(2), two equivalent Ni(4), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Ni(5), one Ni(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 Ni(8), two equivalent Ni(4), and one Zn(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Ni(4), one Ni(8), one Zn(4), and one Zn(5) atom. In the thirteenth O site, O(13) is bonded to two equivalent Ni(6), one Zn(1), and one Zn(6) atom to form distorted corner-sharing OZn2Ni2 trigonal pyramids. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Ni(7), two equivalent Ni(4), and one Zn(5) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Ni(5), two equivalent Ni(6), and one Zn(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ni(3), one Ni(9), and two equivalent Ni(6) atoms. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Ni(3), one Ni(6), one Ni(9), and one Zn(6) atom. In the eighteenth O site, O(18) is bonded in a rectangular see-saw-like geometry to one Ni(8), two equivalent Ni(6), and one Zn(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn(NiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.885
_cell_length_b   5.882
_cell_length_c   17.577
_cell_angle_alpha   59.906
_cell_angle_beta   60.524
_cell_angle_gamma   60.005
_symmetry_Int_Tables_number   1
_cell_volume   431.615
_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  0.140  0.118  0.041  1.0
  Zn  Zn1  1  0.500  0.502  0.332  1.0
  Zn  Zn2  1  1.000  0.500  0.167  1.0
  Zn  Zn3  1  0.499  0.498  0.668  1.0
  Zn  Zn4  1  1.000  0.500  0.500  1.0
  Zn  Zn5  1  0.999  0.500  0.834  1.0
  Ni  Ni6  1  0.503  0.004  0.165  1.0
  Ni  Ni7  1  0.129  0.119  0.377  1.0
  Ni  Ni8  1  0.499  0.500  0.001  1.0
  Ni  Ni9  1  0.503  0.498  0.165  1.0
  Ni  Ni10  1  0.500  1.000  0.500  1.0
  Ni  Ni11  1  0.131  0.120  0.709  1.0
  Ni  Ni12  1  0.500  0.500  0.500  1.0
  Ni  Ni13  1  0.498  0.996  0.835  1.0
  Ni  Ni14  1  0.870  0.880  0.290  1.0
  Ni  Ni15  1  0.498  0.502  0.835  1.0
  Ni  Ni16  1  0.870  0.880  0.624  1.0
  Ni  Ni17  1  0.862  0.881  0.958  1.0
  O  O18  1  0.282  0.257  0.085  1.0
  O  O19  1  0.282  0.247  0.241  1.0
  O  O20  1  0.282  0.706  0.085  1.0
  O  O21  1  0.730  0.254  0.087  1.0
  O  O22  1  0.268  0.247  0.423  1.0
  O  O23  1  0.264  0.758  0.240  1.0
  O  O24  1  0.271  0.245  0.580  1.0
  O  O25  1  0.731  0.280  0.243  1.0
  O  O26  1  0.268  0.716  0.423  1.0
  O  O27  1  0.718  0.751  0.094  1.0
  O  O28  1  0.724  0.248  0.427  1.0
  O  O29  1  0.731  0.760  0.243  1.0
  O  O30  1  0.268  0.241  0.755  1.0
  O  O31  1  0.276  0.752  0.573  1.0
  O  O32  1  0.732  0.283  0.577  1.0
  O  O33  1  0.268  0.725  0.755  1.0
  O  O34  1  0.281  0.254  0.904  1.0
  O  O35  1  0.727  0.755  0.421  1.0
  O  O36  1  0.747  0.242  0.757  1.0
  O  O37  1  0.732  0.754  0.577  1.0
  O  O38  1  0.270  0.742  0.916  1.0
  O  O39  1  0.716  0.289  0.917  1.0
  O  O40  1  0.718  0.750  0.761  1.0
  O  O41  1  0.715  0.745  0.917  1.0
[/CIF]
.
The structure described by Zn(NiO2)2 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are nine inequivalent Ni sites. In the first Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(9)O4 tetrahedra, corners with two equivalent Ni(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Zn(3)O6 octahedra. In the second Ni site, Ni(2) is bonded to one O(2), one O(9), and two equivalent O(4) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. In the third Ni site, Ni(3) is bonded to one O(16), one O(3), two equivalent O(1), and two equivalent O(17) atoms to form NiO6 octahedra that share corners with three equivalent Ni(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 Ni(1)O6 octahedra, and edges with two equivalent Ni(6)O6 octahedra. In the fourth Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(5)O4 tetrahedra,  a cornercorner with one Ni(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Zn(5)O6 octahedra. In the fifth Ni site, Ni(5) is bonded to one O(15), one O(6), and two equivalent O(10) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. In the sixth Ni site, Ni(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 NiO6 octahedra that share  a cornercorner with one Ni(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, corners with two equivalent Ni(9)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, edges with two equivalent Ni(6)O6 octahedra, and edges with two equivalent Zn(6)O6 octahedra. In the seventh Ni site, Ni(7) is bonded to one O(14), one O(5), and two equivalent O(7) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(5)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, and corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-61°. In the eighth Ni site, Ni(8) is bonded to one O(11), one O(18), and two equivalent O(12) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(6)O6 octahedra, corners with two equivalent Ni(6)O6 octahedra, corners with two equivalent Zn(5)O6 octahedra, corners with three equivalent Zn(4)O6 octahedra, and corners with four equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the ninth Ni site, Ni(9) is bonded to one O(16), one O(8), and two equivalent O(17) atoms to form NiO4 tetrahedra that share  a cornercorner with one Zn(3)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Zn(6)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra, and corners with four equivalent Ni(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-63°. 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 Ni(6)O6 octahedra, corners with two equivalent Zn(3)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra, and corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-62°. 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 Ni(2)O4 tetrahedra, corners with three equivalent Ni(7)O4 tetrahedra,  an edgeedge with one Zn(3)O6 octahedra,  an edgeedge with one Zn(5)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(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 Ni(2)O4 tetrahedra,  a cornercorner with one Ni(9)O4 tetrahedra, corners with two equivalent Ni(7)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with four equivalent Ni(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 Ni(5)O4 tetrahedra, corners with three equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(5)O6 octahedra,  an edgeedge with one Zn(6)O6 octahedra, edges with two equivalent Ni(4)O6 octahedra, and edges with two equivalent Ni(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 Ni(5)O4 tetrahedra,  a cornercorner with one Ni(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(8)O4 tetrahedra,  an edgeedge with one Zn(2)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Ni(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 Ni(8)O4 tetrahedra,  a cornercorner with one Zn(1)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, corners with two equivalent Ni(9)O4 tetrahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Zn(4)O6 octahedra, and edges with four equivalent Ni(6)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded to one Ni(1), one Ni(3), one Zn(1), and one Zn(3) atom to form a mixture of distorted corner and edge-sharing OZn2Ni2 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Ni(2), two equivalent Ni(1), and one Zn(3) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Ni(3), two equivalent Ni(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Ni(2), one Ni(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 Ni(7), two equivalent Ni(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Ni(5), two equivalent Ni(4), and one Zn(5) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Ni(1), one Ni(7), one Zn(2), and one Zn(3) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Ni(9), two equivalent Ni(1), and one Zn(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Ni(2), two equivalent Ni(4), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Ni(5), one Ni(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 Ni(8), two equivalent Ni(4), and one Zn(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Ni(4), one Ni(8), one Zn(4), and one Zn(5) atom. In the thirteenth O site, O(13) is bonded to two equivalent Ni(6), one Zn(1), and one Zn(6) atom to form distorted corner-sharing OZn2Ni2 trigonal pyramids. In the fourteenth O site, O(14) is bonded in a rectangular see-saw-like geometry to one Ni(7), two equivalent Ni(4), and one Zn(5) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Ni(5), two equivalent Ni(6), and one Zn(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ni(3), one Ni(9), and two equivalent Ni(6) atoms. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Ni(3), one Ni(6), one Ni(9), and one Zn(6) atom. In the eighteenth O site, O(18) is bonded in a rectangular see-saw-like geometry to one Ni(8), two equivalent Ni(6), and one Zn(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn(NiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.885
_cell_length_b   5.882
_cell_length_c   17.577
_cell_angle_alpha   59.906
_cell_angle_beta   60.524
_cell_angle_gamma   60.005
_symmetry_Int_Tables_number   1
_cell_volume   431.615
_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  0.140  0.118  0.041  1.0
  Zn  Zn1  1  0.500  0.502  0.332  1.0
  Zn  Zn2  1  1.000  0.500  0.167  1.0
  Zn  Zn3  1  0.499  0.498  0.668  1.0
  Zn  Zn4  1  1.000  0.500  0.500  1.0
  Zn  Zn5  1  0.999  0.500  0.834  1.0
  Ni  Ni6  1  0.503  0.004  0.165  1.0
  Ni  Ni7  1  0.129  0.119  0.377  1.0
  Ni  Ni8  1  0.499  0.500  0.001  1.0
  Ni  Ni9  1  0.503  0.498  0.165  1.0
  Ni  Ni10  1  0.500  1.000  0.500  1.0
  Ni  Ni11  1  0.131  0.120  0.709  1.0
  Ni  Ni12  1  0.500  0.500  0.500  1.0
  Ni  Ni13  1  0.498  0.996  0.835  1.0
  Ni  Ni14  1  0.870  0.880  0.290  1.0
  Ni  Ni15  1  0.498  0.502  0.835  1.0
  Ni  Ni16  1  0.870  0.880  0.624  1.0
  Ni  Ni17  1  0.862  0.881  0.958  1.0
  O  O18  1  0.282  0.257  0.085  1.0
  O  O19  1  0.282  0.247  0.241  1.0
  O  O20  1  0.282  0.706  0.085  1.0
  O  O21  1  0.730  0.254  0.087  1.0
  O  O22  1  0.268  0.247  0.423  1.0
  O  O23  1  0.264  0.758  0.240  1.0
  O  O24  1  0.271  0.245  0.580  1.0
  O  O25  1  0.731  0.280  0.243  1.0
  O  O26  1  0.268  0.716  0.423  1.0
  O  O27  1  0.718  0.751  0.094  1.0
  O  O28  1  0.724  0.248  0.427  1.0
  O  O29  1  0.731  0.760  0.243  1.0
  O  O30  1  0.268  0.241  0.755  1.0
  O  O31  1  0.276  0.752  0.573  1.0
  O  O32  1  0.732  0.283  0.577  1.0
  O  O33  1  0.268  0.725  0.755  1.0
  O  O34  1  0.281  0.254  0.904  1.0
  O  O35  1  0.727  0.755  0.421  1.0
  O  O36  1  0.747  0.242  0.757  1.0
  O  O37  1  0.732  0.754  0.577  1.0
  O  O38  1  0.270  0.742  0.916  1.0
  O  O39  1  0.716  0.289  0.917  1.0
  O  O40  1  0.718  0.750  0.761  1.0
  O  O41  1  0.715  0.745  0.917  1.0
[/CIF]
.