SrMg2N2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent N(1) atoms to form SrN6 octahedra that share corners with twelve equivalent Mg(1)N4 tetrahedra, edges with six equivalent Sr(1)N6 octahedra, and edges with six equivalent Mg(1)N4 tetrahedra. Mg(1) is bonded to four equivalent N(1) atoms to form MgN4 tetrahedra that share corners with six equivalent Sr(1)N6 octahedra, corners with six equivalent Mg(1)N4 tetrahedra, edges with three equivalent Sr(1)N6 octahedra, and edges with three equivalent Mg(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 25-50°. N(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mg(1) atoms.
SrMg2N2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent N(1) atoms to form SrN6 octahedra that share corners with twelve equivalent Mg(1)N4 tetrahedra, edges with six equivalent Sr(1)N6 octahedra, and edges with six equivalent Mg(1)N4 tetrahedra. All Sr(1)-N(1) bond lengths are 2.76 Å. Mg(1) is bonded to four equivalent N(1) atoms to form MgN4 tetrahedra that share corners with six equivalent Sr(1)N6 octahedra, corners with six equivalent Mg(1)N4 tetrahedra, edges with three equivalent Sr(1)N6 octahedra, and edges with three equivalent Mg(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 25-50°. There are three shorter (2.18 Å) and one longer (2.25 Å) Mg(1)-N(1) bond length. N(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mg(1) atoms.