Sr3(InN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(2) and three equivalent N(1) atoms to form distorted SrN5 trigonal bipyramids that share corners with five equivalent Sr(2)N6 octahedra, corners with six equivalent In(1)N4 tetrahedra, corners with two equivalent Sr(1)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N6 octahedra, edges with two equivalent In(1)N4 tetrahedra, and edges with three equivalent Sr(1)N5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 34-62°. In the second Sr site, Sr(2) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form distorted SrN6 octahedra that share corners with four equivalent In(1)N4 tetrahedra, corners with ten equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Sr(2)N6 octahedra, edges with four equivalent In(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. In(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form InN4 tetrahedra that share corners with two equivalent Sr(2)N6 octahedra, corners with two equivalent In(1)N4 tetrahedra, corners with six equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Sr(2)N6 octahedra,  an edgeedge with one In(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 31-62°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), and two equivalent In(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent In(1) atoms.
Sr3(InN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(2) and three equivalent N(1) atoms to form distorted SrN5 trigonal bipyramids that share corners with five equivalent Sr(2)N6 octahedra, corners with six equivalent In(1)N4 tetrahedra, corners with two equivalent Sr(1)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N6 octahedra, edges with two equivalent In(1)N4 tetrahedra, and edges with three equivalent Sr(1)N5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 34-62°. There is one shorter (2.59 Å) and one longer (2.81 Å) Sr(1)-N(2) bond length. There are a spread of Sr(1)-N(1) bond distances ranging from 2.67-2.87 Å. In the second Sr site, Sr(2) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form distorted SrN6 octahedra that share corners with four equivalent In(1)N4 tetrahedra, corners with ten equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Sr(2)N6 octahedra, edges with four equivalent In(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. Both Sr(2)-N(1) bond lengths are 2.87 Å. There are two shorter (2.60 Å) and two longer (2.79 Å) Sr(2)-N(2) bond lengths. In(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form InN4 tetrahedra that share corners with two equivalent Sr(2)N6 octahedra, corners with two equivalent In(1)N4 tetrahedra, corners with six equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Sr(2)N6 octahedra,  an edgeedge with one In(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 31-62°. There is one shorter (2.24 Å) and one longer (2.31 Å) In(1)-N(1) bond length. There is one shorter (2.20 Å) and one longer (2.21 Å) In(1)-N(2) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), and two equivalent In(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent In(1) atoms.