Mg2SbN3 is Enargite-like structured and crystallizes in the orthorhombic Cmc2_1 space group. Mg(1) is bonded to one N(2) and three equivalent N(1) atoms to form MgN4 tetrahedra that share corners with five equivalent Sb(1)N4 tetrahedra and corners with seven equivalent Mg(1)N4 tetrahedra. Sb(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form SbN4 tetrahedra that share corners with two equivalent Sb(1)N4 tetrahedra and corners with ten equivalent Mg(1)N4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded to three equivalent Mg(1) and one Sb(1) atom to form NMg3Sb tetrahedra that share corners with five equivalent N(2)Mg2Sb2 tetrahedra and corners with seven equivalent N(1)Mg3Sb tetrahedra. In the second N site, N(2) is bonded to two equivalent Mg(1) and two equivalent Sb(1) atoms to form NMg2Sb2 tetrahedra that share corners with two equivalent N(2)Mg2Sb2 tetrahedra and corners with ten equivalent N(1)Mg3Sb tetrahedra.
Mg2SbN3 is Enargite-like structured and crystallizes in the orthorhombic Cmc2_1 space group. Mg(1) is bonded to one N(2) and three equivalent N(1) atoms to form MgN4 tetrahedra that share corners with five equivalent Sb(1)N4 tetrahedra and corners with seven equivalent Mg(1)N4 tetrahedra. The Mg(1)-N(2) bond length is 2.17 Å. There are a spread of Mg(1)-N(1) bond distances ranging from 2.07-2.09 Å. Sb(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form SbN4 tetrahedra that share corners with two equivalent Sb(1)N4 tetrahedra and corners with ten equivalent Mg(1)N4 tetrahedra. Both Sb(1)-N(1) bond lengths are 1.96 Å. There is one shorter (2.04 Å) and one longer (2.05 Å) Sb(1)-N(2) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded to three equivalent Mg(1) and one Sb(1) atom to form NMg3Sb tetrahedra that share corners with five equivalent N(2)Mg2Sb2 tetrahedra and corners with seven equivalent N(1)Mg3Sb tetrahedra. In the second N site, N(2) is bonded to two equivalent Mg(1) and two equivalent Sb(1) atoms to form NMg2Sb2 tetrahedra that share corners with two equivalent N(2)Mg2Sb2 tetrahedra and corners with ten equivalent N(1)Mg3Sb tetrahedra.