IrN2 is Hausmannite-like structured and crystallizes in the monoclinic P2_1/c space group. Ir(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form IrN6 octahedra that share corners with eight equivalent Ir(1)N6 octahedra, corners with three equivalent N(1)Ir3N tetrahedra, corners with three equivalent N(2)Ir3N tetrahedra, and edges with two equivalent Ir(1)N6 octahedra. The corner-sharing octahedral tilt angles range from 65-69°. There are two inequivalent N sites. In the first N site, N(2) is bonded to three equivalent Ir(1) and one N(1) atom to form NIr3N tetrahedra that share corners with three equivalent Ir(1)N6 octahedra, corners with four equivalent N(2)Ir3N tetrahedra, corners with nine equivalent N(1)Ir3N tetrahedra, and  an edgeedge with one N(2)Ir3N tetrahedra. The corner-sharing octahedral tilt angles range from 67-70°. In the second N site, N(1) is bonded to three equivalent Ir(1) and one N(2) atom to form NIr3N tetrahedra that share corners with three equivalent Ir(1)N6 octahedra, corners with four equivalent N(1)Ir3N tetrahedra, corners with nine equivalent N(2)Ir3N tetrahedra, and  an edgeedge with one N(1)Ir3N tetrahedra. The corner-sharing octahedral tilt angles range from 64-66°.
IrN2 is Hausmannite-like structured and crystallizes in the monoclinic P2_1/c space group. Ir(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form IrN6 octahedra that share corners with eight equivalent Ir(1)N6 octahedra, corners with three equivalent N(1)Ir3N tetrahedra, corners with three equivalent N(2)Ir3N tetrahedra, and edges with two equivalent Ir(1)N6 octahedra. The corner-sharing octahedral tilt angles range from 65-69°. There are a spread of Ir(1)-N(1) bond distances ranging from 2.10-2.13 Å. There is one shorter (2.05 Å) and two longer (2.07 Å) Ir(1)-N(2) bond lengths. There are two inequivalent N sites. In the first N site, N(2) is bonded to three equivalent Ir(1) and one N(1) atom to form NIr3N tetrahedra that share corners with three equivalent Ir(1)N6 octahedra, corners with four equivalent N(2)Ir3N tetrahedra, corners with nine equivalent N(1)Ir3N tetrahedra, and  an edgeedge with one N(2)Ir3N tetrahedra. The corner-sharing octahedral tilt angles range from 67-70°. The N(2)-N(1) bond length is 1.43 Å. In the second N site, N(1) is bonded to three equivalent Ir(1) and one N(2) atom to form NIr3N tetrahedra that share corners with three equivalent Ir(1)N6 octahedra, corners with four equivalent N(1)Ir3N tetrahedra, corners with nine equivalent N(2)Ir3N tetrahedra, and  an edgeedge with one N(1)Ir3N tetrahedra. The corner-sharing octahedral tilt angles range from 64-66°.