Sr3C3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent C(1), one N(1), one N(2), two equivalent N(3), and two equivalent N(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to two equivalent C(1), one N(1), one N(3), one N(4), and two equivalent N(5) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and two equivalent N(5) atoms. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted L-shaped geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent N(3) atoms. In the second C site, C(2) is bonded in a 3-coordinate geometry to one N(1), one N(2), and one N(4) atom. In the third C site, C(3) is bonded in a 3-coordinate geometry to one N(1), one N(2), and one N(5) atom. There are five inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one C(2), and one C(3) atom. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one C(2), and one C(3) atom. In the third N site, N(3) is bonded in a 2-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent C(1) atoms. In the fourth N site, N(4) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and one C(2) atom. In the fifth N site, N(5) is bonded in a 5-coordinate geometry to two equivalent Sr(2), two equivalent Sr(3), and one C(3) atom.
Sr3C3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent C(1), one N(1), one N(2), two equivalent N(3), and two equivalent N(4) atoms. There is one shorter (2.68 Å) and one longer (2.77 Å) Sr(1)-C(1) bond length. The Sr(1)-N(1) bond length is 2.71 Å. The Sr(1)-N(2) bond length is 2.82 Å. There is one shorter (2.72 Å) and one longer (2.74 Å) Sr(1)-N(3) bond length. There is one shorter (2.70 Å) and one longer (2.75 Å) Sr(1)-N(4) bond length. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to two equivalent C(1), one N(1), one N(3), one N(4), and two equivalent N(5) atoms. There is one shorter (2.64 Å) and one longer (2.78 Å) Sr(2)-C(1) bond length. The Sr(2)-N(1) bond length is 2.67 Å. The Sr(2)-N(3) bond length is 2.64 Å. The Sr(2)-N(4) bond length is 2.57 Å. There is one shorter (2.75 Å) and one longer (2.99 Å) Sr(2)-N(5) bond length. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and two equivalent N(5) atoms. The Sr(3)-N(1) bond length is 2.65 Å. The Sr(3)-N(2) bond length is 2.67 Å. The Sr(3)-N(3) bond length is 2.67 Å. The Sr(3)-N(4) bond length is 2.79 Å. There is one shorter (2.56 Å) and one longer (2.69 Å) Sr(3)-N(5) bond length. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted L-shaped geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent N(3) atoms. There is one shorter (1.44 Å) and one longer (1.46 Å) C(1)-N(3) bond length. In the second C site, C(2) is bonded in a 3-coordinate geometry to one N(1), one N(2), and one N(4) atom. The C(2)-N(1) bond length is 1.44 Å. The C(2)-N(2) bond length is 1.44 Å. The C(2)-N(4) bond length is 1.29 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one N(1), one N(2), and one N(5) atom. The C(3)-N(1) bond length is 1.47 Å. The C(3)-N(2) bond length is 1.45 Å. The C(3)-N(5) bond length is 1.28 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one C(2), and one C(3) atom. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one C(2), and one C(3) atom. In the third N site, N(3) is bonded in a 2-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent C(1) atoms. In the fourth N site, N(4) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), two equivalent Sr(1), and one C(2) atom. In the fifth N site, N(5) is bonded in a 5-coordinate geometry to two equivalent Sr(2), two equivalent Sr(3), and one C(3) atom.