Li2Sr6Cr2N8O crystallizes in the triclinic P-1 space group. Li(1) is bonded to one N(3), two equivalent N(4), and one O(1) atom to form distorted LiN3O tetrahedra that share corners with two equivalent Sr(3)N6 pentagonal pyramids,  a cornercorner with one Li(1)N3O tetrahedra,  a cornercorner with one Cr(1)N4 tetrahedra,  an edgeedge with one Li(1)N3O tetrahedra, and  an edgeedge with one Cr(1)N4 tetrahedra. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one N(1), one N(4), two equivalent N(2), two equivalent N(3), and one O(1) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one N(2), two equivalent N(1), two equivalent N(4), and one O(1) atom. In the third Sr site, Sr(3) is bonded to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN6 pentagonal pyramids that share corners with two equivalent Li(1)N3O tetrahedra, corners with two equivalent Cr(1)N4 tetrahedra, edges with three equivalent Sr(3)N6 pentagonal pyramids, and edges with two equivalent Cr(1)N4 tetrahedra. Cr(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form CrN4 tetrahedra that share corners with two equivalent Sr(3)N6 pentagonal pyramids,  a cornercorner with one Li(1)N3O tetrahedra, edges with two equivalent Sr(3)N6 pentagonal pyramids, and  an edgeedge with one Li(1)N3O tetrahedra. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(2), two equivalent Sr(3), and one Cr(1) atom to form distorted NSr5Cr octahedra that share  a cornercorner with one O(1)Sr4Li2 octahedra,  an edgeedge with one O(1)Sr4Li2 octahedra, and edges with two equivalent N(1)Sr5Cr octahedra. The corner-sharing octahedral tilt angles are 69°. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(2), two equivalent Sr(1), two equivalent Sr(3), and one Cr(1) atom. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(3), and one Cr(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to two equivalent Li(1), one Sr(1), two equivalent Sr(2), and one Cr(1) atom. O(1) is bonded to two equivalent Li(1), two equivalent Sr(1), and two equivalent Sr(2) atoms to form distorted OSr4Li2 octahedra that share corners with two equivalent N(1)Sr5Cr octahedra and edges with two equivalent N(1)Sr5Cr octahedra. The corner-sharing octahedral tilt angles are 69°.
Li2Sr6Cr2N8O crystallizes in the triclinic P-1 space group. Li(1) is bonded to one N(3), two equivalent N(4), and one O(1) atom to form distorted LiN3O tetrahedra that share corners with two equivalent Sr(3)N6 pentagonal pyramids,  a cornercorner with one Li(1)N3O tetrahedra,  a cornercorner with one Cr(1)N4 tetrahedra,  an edgeedge with one Li(1)N3O tetrahedra, and  an edgeedge with one Cr(1)N4 tetrahedra. The Li(1)-N(3) bond length is 2.07 Å. There is one shorter (2.08 Å) and one longer (2.19 Å) Li(1)-N(4) bond length. The Li(1)-O(1) bond length is 1.98 Å. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one N(1), one N(4), two equivalent N(2), two equivalent N(3), and one O(1) atom. The Sr(1)-N(1) bond length is 2.66 Å. The Sr(1)-N(4) bond length is 3.05 Å. There is one shorter (2.88 Å) and one longer (2.91 Å) Sr(1)-N(2) bond length. There is one shorter (2.78 Å) and one longer (2.86 Å) Sr(1)-N(3) bond length. The Sr(1)-O(1) bond length is 2.79 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one N(2), two equivalent N(1), two equivalent N(4), and one O(1) atom. The Sr(2)-N(2) bond length is 2.60 Å. There is one shorter (2.65 Å) and one longer (2.83 Å) Sr(2)-N(1) bond length. There is one shorter (2.64 Å) and one longer (2.82 Å) Sr(2)-N(4) bond length. The Sr(2)-O(1) bond length is 2.45 Å. In the third Sr site, Sr(3) is bonded to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN6 pentagonal pyramids that share corners with two equivalent Li(1)N3O tetrahedra, corners with two equivalent Cr(1)N4 tetrahedra, edges with three equivalent Sr(3)N6 pentagonal pyramids, and edges with two equivalent Cr(1)N4 tetrahedra. There is one shorter (2.66 Å) and one longer (2.68 Å) Sr(3)-N(1) bond length. There is one shorter (2.56 Å) and one longer (2.63 Å) Sr(3)-N(2) bond length. Both Sr(3)-N(3) bond lengths are 2.66 Å. Cr(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form CrN4 tetrahedra that share corners with two equivalent Sr(3)N6 pentagonal pyramids,  a cornercorner with one Li(1)N3O tetrahedra, edges with two equivalent Sr(3)N6 pentagonal pyramids, and  an edgeedge with one Li(1)N3O tetrahedra. The Cr(1)-N(1) bond length is 1.78 Å. The Cr(1)-N(2) bond length is 1.76 Å. The Cr(1)-N(3) bond length is 1.76 Å. The Cr(1)-N(4) bond length is 1.75 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(2), two equivalent Sr(3), and one Cr(1) atom to form distorted NSr5Cr octahedra that share  a cornercorner with one O(1)Sr4Li2 octahedra,  an edgeedge with one O(1)Sr4Li2 octahedra, and edges with two equivalent N(1)Sr5Cr octahedra. The corner-sharing octahedral tilt angles are 69°. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(2), two equivalent Sr(1), two equivalent Sr(3), and one Cr(1) atom. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(3), and one Cr(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to two equivalent Li(1), one Sr(1), two equivalent Sr(2), and one Cr(1) atom. O(1) is bonded to two equivalent Li(1), two equivalent Sr(1), and two equivalent Sr(2) atoms to form distorted OSr4Li2 octahedra that share corners with two equivalent N(1)Sr5Cr octahedra and edges with two equivalent N(1)Sr5Cr octahedra. The corner-sharing octahedral tilt angles are 69°.