Sr4CoN4 crystallizes in the triclinic P-1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one N(1), one N(4), two equivalent N(2), and two equivalent N(3) atoms. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(4), two equivalent N(2), and two equivalent N(3) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one N(3), two equivalent N(1), and two equivalent N(4) atoms. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one N(2), one N(3), two equivalent N(1), and two equivalent N(4) atoms. Co(1) is bonded in a tetrahedral geometry to one N(1), one N(2), one N(3), and one N(4) atom. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Co(1) atom to form a mixture of face, corner, and edge-sharing NSr5Co octahedra. The corner-sharing octahedral tilt angles range from 44-64°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Co(1) atom to form a mixture of distorted face, corner, and edge-sharing NSr5Co octahedra. The corner-sharing octahedral tilt angles range from 44-64°. In the third N site, N(3) is bonded in a 7-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Co(1) atom. In the fourth N site, N(4) is bonded in a 7-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(3), two equivalent Sr(4), and one Co(1) atom.
Sr4CoN4 crystallizes in the triclinic P-1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one N(1), one N(4), two equivalent N(2), and two equivalent N(3) atoms. The Sr(1)-N(1) bond length is 2.62 Å. The Sr(1)-N(4) bond length is 2.89 Å. There is one shorter (2.66 Å) and one longer (2.67 Å) Sr(1)-N(2) bond length. There is one shorter (2.84 Å) and one longer (2.98 Å) Sr(1)-N(3) bond length. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(4), two equivalent N(2), and two equivalent N(3) atoms. The Sr(2)-N(4) bond length is 2.98 Å. There is one shorter (2.50 Å) and one longer (2.54 Å) Sr(2)-N(2) bond length. There is one shorter (2.60 Å) and one longer (2.68 Å) Sr(2)-N(3) bond length. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one N(3), two equivalent N(1), and two equivalent N(4) atoms. The Sr(3)-N(3) bond length is 2.68 Å. There is one shorter (2.47 Å) and one longer (2.56 Å) Sr(3)-N(1) bond length. There is one shorter (2.71 Å) and one longer (2.95 Å) Sr(3)-N(4) bond length. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one N(2), one N(3), two equivalent N(1), and two equivalent N(4) atoms. The Sr(4)-N(2) bond length is 2.72 Å. The Sr(4)-N(3) bond length is 3.09 Å. There is one shorter (2.52 Å) and one longer (2.69 Å) Sr(4)-N(1) bond length. There is one shorter (2.86 Å) and one longer (3.04 Å) Sr(4)-N(4) bond length. Co(1) is bonded in a tetrahedral geometry to one N(1), one N(2), one N(3), and one N(4) atom. The Co(1)-N(1) bond length is 1.86 Å. The Co(1)-N(2) bond length is 1.83 Å. The Co(1)-N(3) bond length is 1.81 Å. The Co(1)-N(4) bond length is 1.84 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Co(1) atom to form a mixture of face, corner, and edge-sharing NSr5Co octahedra. The corner-sharing octahedral tilt angles range from 44-64°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Co(1) atom to form a mixture of distorted face, corner, and edge-sharing NSr5Co octahedra. The corner-sharing octahedral tilt angles range from 44-64°. In the third N site, N(3) is bonded in a 7-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Co(1) atom. In the fourth N site, N(4) is bonded in a 7-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(3), two equivalent Sr(4), and one Co(1) atom.