Sr5(GeN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(1), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with two equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Ge(1)N4 tetrahedra, and  an edgeedge with one Sr(1)N5 trigonal bipyramid. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms. Ge(1) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form GeN4 tetrahedra that share corners with two equivalent Sr(1)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. There are three inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and two equivalent Ge(1) atoms. In the second N site, N(2) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles range from 19-72°. In the third N site, N(3) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles range from 19-72°.
Sr5(GeN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(1), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with two equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(1)N5 trigonal bipyramids, edges with two equivalent Ge(1)N4 tetrahedra, and  an edgeedge with one Sr(1)N5 trigonal bipyramid. The Sr(1)-N(1) bond length is 2.64 Å. There is one shorter (2.58 Å) and one longer (2.65 Å) Sr(1)-N(2) bond length. There is one shorter (2.46 Å) and one longer (2.67 Å) Sr(1)-N(3) bond length. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms. There is one shorter (2.82 Å) and one longer (3.20 Å) Sr(2)-N(1) bond length. There is one shorter (2.78 Å) and one longer (2.95 Å) Sr(2)-N(2) bond length. There is one shorter (2.62 Å) and one longer (2.74 Å) Sr(2)-N(3) bond length. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms. Both Sr(3)-N(1) bond lengths are 3.12 Å. Both Sr(3)-N(2) bond lengths are 2.50 Å. Both Sr(3)-N(3) bond lengths are 2.77 Å. Ge(1) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form GeN4 tetrahedra that share corners with two equivalent Sr(1)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra, and edges with two equivalent Sr(1)N5 trigonal bipyramids. The Ge(1)-N(2) bond length is 1.87 Å. The Ge(1)-N(3) bond length is 1.84 Å. There is one shorter (1.92 Å) and one longer (1.98 Å) Ge(1)-N(1) bond length. There are three inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and two equivalent Ge(1) atoms. In the second N site, N(2) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles range from 19-72°. In the third N site, N(3) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles range from 19-72°.