CrN2 crystallizes in the triclinic P1 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one N(1), one N(4), one N(5), one N(6), and one N(7) atom to form CrN5 trigonal bipyramids that share  a cornercorner with one Cr(2)N4 tetrahedra, corners with two equivalent Cr(4)N4 tetrahedra, corners with two equivalent Cr(3)N5 trigonal bipyramids, and  an edgeedge with one Cr(3)N5 trigonal bipyramid. In the second Cr site, Cr(2) is bonded to one N(1), one N(2), one N(3), and one N(8) atom to form CrN4 tetrahedra that share corners with two equivalent Cr(4)N4 tetrahedra,  a cornercorner with one Cr(1)N5 trigonal bipyramid, and corners with two equivalent Cr(3)N5 trigonal bipyramids. In the third Cr site, Cr(3) is bonded to one N(1), one N(2), one N(4), one N(6), and one N(7) atom to form distorted CrN5 trigonal bipyramids that share  a cornercorner with one Cr(4)N4 tetrahedra, corners with two equivalent Cr(2)N4 tetrahedra, corners with two equivalent Cr(1)N5 trigonal bipyramids, and  an edgeedge with one Cr(1)N5 trigonal bipyramid. In the fourth Cr site, Cr(4) is bonded to one N(3), one N(5), one N(6), and one N(8) atom to form CrN4 tetrahedra that share corners with two equivalent Cr(2)N4 tetrahedra,  a cornercorner with one Cr(3)N5 trigonal bipyramid, and corners with two equivalent Cr(1)N5 trigonal bipyramids. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second N site, N(2) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(4) atom. In the fourth N site, N(4) is bonded in a linear geometry to one Cr(1) and one Cr(3) atom. In the fifth N site, N(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the sixth N site, N(6) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(3), and one Cr(4) atom. In the seventh N site, N(7) is bonded in a bent 120 degrees geometry to one Cr(1) and one Cr(3) atom. In the eighth N site, N(8) is bonded in a linear geometry to one Cr(2) and one Cr(4) atom.
CrN2 crystallizes in the triclinic P1 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one N(1), one N(4), one N(5), one N(6), and one N(7) atom to form CrN5 trigonal bipyramids that share  a cornercorner with one Cr(2)N4 tetrahedra, corners with two equivalent Cr(4)N4 tetrahedra, corners with two equivalent Cr(3)N5 trigonal bipyramids, and  an edgeedge with one Cr(3)N5 trigonal bipyramid. The Cr(1)-N(1) bond length is 1.90 Å. The Cr(1)-N(4) bond length is 1.93 Å. The Cr(1)-N(5) bond length is 1.66 Å. The Cr(1)-N(6) bond length is 1.97 Å. The Cr(1)-N(7) bond length is 1.75 Å. In the second Cr site, Cr(2) is bonded to one N(1), one N(2), one N(3), and one N(8) atom to form CrN4 tetrahedra that share corners with two equivalent Cr(4)N4 tetrahedra,  a cornercorner with one Cr(1)N5 trigonal bipyramid, and corners with two equivalent Cr(3)N5 trigonal bipyramids. The Cr(2)-N(1) bond length is 1.76 Å. The Cr(2)-N(2) bond length is 1.64 Å. The Cr(2)-N(3) bond length is 1.89 Å. The Cr(2)-N(8) bond length is 1.75 Å. In the third Cr site, Cr(3) is bonded to one N(1), one N(2), one N(4), one N(6), and one N(7) atom to form distorted CrN5 trigonal bipyramids that share  a cornercorner with one Cr(4)N4 tetrahedra, corners with two equivalent Cr(2)N4 tetrahedra, corners with two equivalent Cr(1)N5 trigonal bipyramids, and  an edgeedge with one Cr(1)N5 trigonal bipyramid. The Cr(3)-N(1) bond length is 2.08 Å. The Cr(3)-N(2) bond length is 1.93 Å. The Cr(3)-N(4) bond length is 1.62 Å. The Cr(3)-N(6) bond length is 1.95 Å. The Cr(3)-N(7) bond length is 1.72 Å. In the fourth Cr site, Cr(4) is bonded to one N(3), one N(5), one N(6), and one N(8) atom to form CrN4 tetrahedra that share corners with two equivalent Cr(2)N4 tetrahedra,  a cornercorner with one Cr(3)N5 trigonal bipyramid, and corners with two equivalent Cr(1)N5 trigonal bipyramids. The Cr(4)-N(3) bond length is 1.66 Å. The Cr(4)-N(5) bond length is 1.84 Å. The Cr(4)-N(6) bond length is 1.78 Å. The Cr(4)-N(8) bond length is 1.74 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second N site, N(2) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(4) atom. In the fourth N site, N(4) is bonded in a linear geometry to one Cr(1) and one Cr(3) atom. In the fifth N site, N(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the sixth N site, N(6) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(3), and one Cr(4) atom. In the seventh N site, N(7) is bonded in a bent 120 degrees geometry to one Cr(1) and one Cr(3) atom. In the eighth N site, N(8) is bonded in a linear geometry to one Cr(2) and one Cr(4) atom.