NiZn2N2 crystallizes in the monoclinic C2/m space group. Ni(1) is bonded in a distorted trigonal planar geometry to one N(1) and two equivalent N(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 3-coordinate geometry to one N(2) and two equivalent N(1) atoms. In the second Zn site, Zn(2) is bonded in a trigonal planar geometry to one N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Ni(1), one Zn(2), and two equivalent Zn(1) atoms to form distorted NZn3Ni tetrahedra that share corners with two equivalent N(1)Zn3Ni tetrahedra and corners with six equivalent N(2)Zn3Ni2 trigonal bipyramids. In the second N site, N(2) is bonded to two equivalent Ni(1), one Zn(1), and two equivalent Zn(2) atoms to form NZn3Ni2 trigonal bipyramids that share corners with six equivalent N(1)Zn3Ni tetrahedra, corners with two equivalent N(2)Zn3Ni2 trigonal bipyramids, and  an edgeedge with one N(2)Zn3Ni2 trigonal bipyramid.
NiZn2N2 crystallizes in the monoclinic C2/m space group. Ni(1) is bonded in a distorted trigonal planar geometry to one N(1) and two equivalent N(2) atoms. The Ni(1)-N(1) bond length is 1.88 Å. There is one shorter (1.84 Å) and one longer (1.93 Å) Ni(1)-N(2) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 3-coordinate geometry to one N(2) and two equivalent N(1) atoms. The Zn(1)-N(2) bond length is 2.18 Å. Both Zn(1)-N(1) bond lengths are 1.96 Å. In the second Zn site, Zn(2) is bonded in a trigonal planar geometry to one N(1) and two equivalent N(2) atoms. The Zn(2)-N(1) bond length is 2.00 Å. Both Zn(2)-N(2) bond lengths are 1.99 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Ni(1), one Zn(2), and two equivalent Zn(1) atoms to form distorted NZn3Ni tetrahedra that share corners with two equivalent N(1)Zn3Ni tetrahedra and corners with six equivalent N(2)Zn3Ni2 trigonal bipyramids. In the second N site, N(2) is bonded to two equivalent Ni(1), one Zn(1), and two equivalent Zn(2) atoms to form NZn3Ni2 trigonal bipyramids that share corners with six equivalent N(1)Zn3Ni tetrahedra, corners with two equivalent N(2)Zn3Ni2 trigonal bipyramids, and  an edgeedge with one N(2)Zn3Ni2 trigonal bipyramid.