Sr4In2N crystallizes in the tetragonal I4_1/amd space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a single-bond geometry to six equivalent In(1) and one N(1) atom. In the second Sr site, Sr(2) is bonded in a linear geometry to four equivalent In(1) and two equivalent N(1) atoms. In(1) is bonded to four equivalent Sr(2), six equivalent Sr(1), and two equivalent In(1) atoms to form distorted InSr10In2 cuboctahedra that share corners with eight equivalent In(1)Sr10In2 cuboctahedra, corners with two equivalent N(1)Sr6 octahedra, edges with four equivalent In(1)Sr10In2 cuboctahedra, faces with seven equivalent In(1)Sr10In2 cuboctahedra, and faces with four equivalent N(1)Sr6 octahedra. The corner-sharing octahedral tilt angles are 48°. N(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form NSr6 octahedra that share corners with four equivalent In(1)Sr10In2 cuboctahedra, corners with four equivalent N(1)Sr6 octahedra, and faces with eight equivalent In(1)Sr10In2 cuboctahedra. The corner-sharing octahedra are not tilted.
Sr4In2N crystallizes in the tetragonal I4_1/amd space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a single-bond geometry to six equivalent In(1) and one N(1) atom. There are two shorter (3.52 Å) and four longer (3.72 Å) Sr(1)-In(1) bond lengths. The Sr(1)-N(1) bond length is 2.52 Å. In the second Sr site, Sr(2) is bonded in a linear geometry to four equivalent In(1) and two equivalent N(1) atoms. All Sr(2)-In(1) bond lengths are 3.84 Å. Both Sr(2)-N(1) bond lengths are 2.63 Å. In(1) is bonded to four equivalent Sr(2), six equivalent Sr(1), and two equivalent In(1) atoms to form distorted InSr10In2 cuboctahedra that share corners with eight equivalent In(1)Sr10In2 cuboctahedra, corners with two equivalent N(1)Sr6 octahedra, edges with four equivalent In(1)Sr10In2 cuboctahedra, faces with seven equivalent In(1)Sr10In2 cuboctahedra, and faces with four equivalent N(1)Sr6 octahedra. The corner-sharing octahedral tilt angles are 48°. Both In(1)-In(1) bond lengths are 3.34 Å. N(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form NSr6 octahedra that share corners with four equivalent In(1)Sr10In2 cuboctahedra, corners with four equivalent N(1)Sr6 octahedra, and faces with eight equivalent In(1)Sr10In2 cuboctahedra. The corner-sharing octahedra are not tilted.