Cr3N2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to four equivalent N(1) atoms to form distorted CrN4 tetrahedra that share corners with six equivalent Cr(2)N6 octahedra, corners with six equivalent Cr(1)N4 tetrahedra, edges with three equivalent Cr(2)N6 octahedra, and edges with three equivalent Cr(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-51°. In the second Cr site, Cr(2) is bonded to six equivalent N(1) atoms to form CrN6 octahedra that share corners with twelve equivalent Cr(1)N4 tetrahedra, edges with six equivalent Cr(2)N6 octahedra, and edges with six equivalent Cr(1)N4 tetrahedra. N(1) is bonded in a 7-coordinate geometry to three equivalent Cr(2) and four equivalent Cr(1) atoms.
Cr3N2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to four equivalent N(1) atoms to form distorted CrN4 tetrahedra that share corners with six equivalent Cr(2)N6 octahedra, corners with six equivalent Cr(1)N4 tetrahedra, edges with three equivalent Cr(2)N6 octahedra, and edges with three equivalent Cr(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-51°. There are three shorter (1.88 Å) and one longer (2.34 Å) Cr(1)-N(1) bond length. In the second Cr site, Cr(2) is bonded to six equivalent N(1) atoms to form CrN6 octahedra that share corners with twelve equivalent Cr(1)N4 tetrahedra, edges with six equivalent Cr(2)N6 octahedra, and edges with six equivalent Cr(1)N4 tetrahedra. All Cr(2)-N(1) bond lengths are 2.34 Å. N(1) is bonded in a 7-coordinate geometry to three equivalent Cr(2) and four equivalent Cr(1) atoms.