Sr7B3SiNO13 crystallizes in the hexagonal P6_3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to two equivalent N(1), one O(2), one O(4), two equivalent O(3), and three equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(5), three equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. Si(1) is bonded in a tetrahedral geometry to one O(5) and three equivalent O(4) atoms. N(1) is bonded to six equivalent Sr(1) atoms to form distorted face-sharing NSr6 octahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one B(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and one B(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal bipyramidal geometry to one Sr(3), three equivalent Sr(2), and one Si(1) atom.
Sr7B3SiNO13 crystallizes in the hexagonal P6_3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to two equivalent N(1), one O(2), one O(4), two equivalent O(3), and three equivalent O(1) atoms. There is one shorter (2.83 Å) and one longer (3.21 Å) Sr(1)-N(1) bond length. The Sr(1)-O(2) bond length is 2.70 Å. The Sr(1)-O(4) bond length is 2.68 Å. There is one shorter (2.95 Å) and one longer (3.05 Å) Sr(1)-O(3) bond length. There are a spread of Sr(1)-O(1) bond distances ranging from 2.59-2.85 Å. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. The Sr(2)-O(5) bond length is 2.72 Å. There is one shorter (2.44 Å) and one longer (2.50 Å) Sr(2)-O(2) bond length. There is one shorter (2.52 Å) and one longer (2.77 Å) Sr(2)-O(3) bond length. There is one shorter (2.58 Å) and one longer (2.63 Å) Sr(2)-O(4) bond length. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(5), three equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. The Sr(3)-O(5) bond length is 2.49 Å. All Sr(3)-O(2) bond lengths are 2.98 Å. All Sr(3)-O(3) bond lengths are 2.64 Å. All Sr(3)-O(4) bond lengths are 2.78 Å. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(1)-O(1) bond length is 1.38 Å. The B(1)-O(2) bond length is 1.39 Å. The B(1)-O(3) bond length is 1.39 Å. Si(1) is bonded in a tetrahedral geometry to one O(5) and three equivalent O(4) atoms. The Si(1)-O(5) bond length is 1.66 Å. All Si(1)-O(4) bond lengths are 1.65 Å. N(1) is bonded to six equivalent Sr(1) atoms to form distorted face-sharing NSr6 octahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one B(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and one B(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(3), two equivalent Sr(1), two equivalent Sr(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), two equivalent Sr(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal bipyramidal geometry to one Sr(3), three equivalent Sr(2), and one Si(1) atom.