Sr4RuN4 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 5-coordinate geometry to one N(1), one N(3), one N(4), and two equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent N(2) and two equivalent N(3) atoms. In the third Sr site, Sr(3) is bonded to one N(3), two equivalent N(1), and two equivalent N(4) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ru(1)N4 tetrahedra,  an edgeedge with one Ru(1)N4 tetrahedra, and edges with two equivalent Sr(3)N5 trigonal bipyramids. 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. Ru(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted RuN4 tetrahedra that share corners with three equivalent Sr(3)N5 trigonal bipyramids and  an edgeedge with one Sr(3)N5 trigonal bipyramid. 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 Ru(1) atom to form a mixture of face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 18-61°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ru(1) atom to form a mixture of face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 36-73°. In the third N site, N(3) is bonded to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ru(1) atom to form a mixture of distorted face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 18-73°. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Ru(1) atom.
Sr4RuN4 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 5-coordinate geometry to one N(1), one N(3), one N(4), and two equivalent N(2) atoms. The Sr(1)-N(1) bond length is 2.58 Å. The Sr(1)-N(3) bond length is 2.79 Å. The Sr(1)-N(4) bond length is 2.93 Å. There is one shorter (2.62 Å) and one longer (2.68 Å) Sr(1)-N(2) bond length. In the second Sr site, Sr(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent N(2) and two equivalent N(3) atoms. There is one shorter (2.49 Å) and one longer (2.61 Å) Sr(2)-N(2) bond length. There is one shorter (2.68 Å) and one longer (2.69 Å) Sr(2)-N(3) bond length. In the third Sr site, Sr(3) is bonded to one N(3), two equivalent N(1), and two equivalent N(4) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ru(1)N4 tetrahedra,  an edgeedge with one Ru(1)N4 tetrahedra, and edges with two equivalent Sr(3)N5 trigonal bipyramids. The Sr(3)-N(3) bond length is 2.59 Å. There is one shorter (2.51 Å) and one longer (2.54 Å) Sr(3)-N(1) bond length. There is one shorter (2.80 Å) and one longer (2.81 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 2.79 Å. The Sr(4)-N(3) bond length is 2.72 Å. There is one shorter (2.64 Å) and one longer (2.69 Å) Sr(4)-N(1) bond length. There is one shorter (2.89 Å) and one longer (2.96 Å) Sr(4)-N(4) bond length. Ru(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form distorted RuN4 tetrahedra that share corners with three equivalent Sr(3)N5 trigonal bipyramids and  an edgeedge with one Sr(3)N5 trigonal bipyramid. The Ru(1)-N(1) bond length is 2.09 Å. The Ru(1)-N(2) bond length is 2.03 Å. The Ru(1)-N(3) bond length is 1.95 Å. The Ru(1)-N(4) bond length is 1.85 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 Ru(1) atom to form a mixture of face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 18-61°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ru(1) atom to form a mixture of face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 36-73°. In the third N site, N(3) is bonded to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ru(1) atom to form a mixture of distorted face, corner, and edge-sharing NSr5Ru octahedra. The corner-sharing octahedral tilt angles range from 18-73°. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Ru(1) atom.