Sr5(MnN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms. In the second Sr site, Sr(2) is bonded to one N(3), two equivalent N(1), and two equivalent N(2) atoms to form distorted SrN5 trigonal bipyramids that share corners with two equivalent Mn(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids, edges with two equivalent Mn(1)N4 tetrahedra, and  an edgeedge with one Sr(2)N5 trigonal bipyramid. 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. Mn(1) is bonded to one N(1), one N(2), and two equivalent N(3) atoms to form MnN4 tetrahedra that share corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Mn(1)N4 tetrahedra, and edges with two equivalent Sr(2)N5 trigonal bipyramids. There are three inequivalent N sites. In the first N site, N(2) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Mn(1) atom to form a mixture of distorted corner and edge-sharing NSr5Mn octahedra. The corner-sharing octahedral tilt angles range from 18-77°. In the second N site, N(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent Mn(1) atoms. In the third N site, N(1) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Mn(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Mn octahedra. The corner-sharing octahedral tilt angles range from 18-77°.
Sr5(MnN3)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) 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 (2.63 Å) and one longer (2.77 Å) Sr(1)-N(1) bond length. There is one shorter (2.70 Å) and one longer (2.87 Å) Sr(1)-N(2) bond length. There is one shorter (2.83 Å) and one longer (3.14 Å) Sr(1)-N(3) bond length. In the second Sr site, Sr(2) is bonded to one N(3), two equivalent N(1), and two equivalent N(2) atoms to form distorted SrN5 trigonal bipyramids that share corners with two equivalent Mn(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids, edges with two equivalent Mn(1)N4 tetrahedra, and  an edgeedge with one Sr(2)N5 trigonal bipyramid. The Sr(2)-N(3) bond length is 2.61 Å. There is one shorter (2.53 Å) and one longer (2.65 Å) Sr(2)-N(1) bond length. There is one shorter (2.59 Å) and one longer (2.63 Å) Sr(2)-N(2) 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 2.77 Å. Both Sr(3)-N(2) bond lengths are 2.59 Å. Both Sr(3)-N(3) bond lengths are 2.98 Å. Mn(1) is bonded to one N(1), one N(2), and two equivalent N(3) atoms to form MnN4 tetrahedra that share corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Mn(1)N4 tetrahedra, and edges with two equivalent Sr(2)N5 trigonal bipyramids. The Mn(1)-N(1) bond length is 1.79 Å. The Mn(1)-N(2) bond length is 1.82 Å. There is one shorter (1.85 Å) and one longer (1.95 Å) Mn(1)-N(3) bond length. There are three inequivalent N sites. In the first N site, N(2) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Mn(1) atom to form a mixture of distorted corner and edge-sharing NSr5Mn octahedra. The corner-sharing octahedral tilt angles range from 18-77°. In the second N site, N(3) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent Mn(1) atoms. In the third N site, N(1) is bonded to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one Mn(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Mn octahedra. The corner-sharing octahedral tilt angles range from 18-77°.