Sr4GeN4 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 to one N(4), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(3)N5 trigonal bipyramid, and edges with two equivalent Sr(2)N5 trigonal bipyramids. 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 Ge(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and edges with two equivalent Sr(3)N5 trigonal bipyramids. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(2), one N(3), one N(4), and two equivalent N(1) atoms. Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form GeN4 tetrahedra that share corners with three equivalent Sr(2)N5 trigonal bipyramids, corners with three equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N5 trigonal bipyramid, 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 Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ge(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Ge(1) atom.
Sr4GeN4 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 2.83 Å. The Sr(1)-N(3) bond length is 2.85 Å. The Sr(1)-N(4) bond length is 2.84 Å. There is one shorter (2.52 Å) and one longer (2.68 Å) Sr(1)-N(2) bond length. In the second Sr site, Sr(2) is bonded to one N(4), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(3)N5 trigonal bipyramid, and edges with two equivalent Sr(2)N5 trigonal bipyramids. The Sr(2)-N(4) bond length is 2.85 Å. There is one shorter (2.47 Å) and one longer (2.57 Å) Sr(2)-N(2) bond length. There is one shorter (2.57 Å) and one longer (2.76 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 Ge(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and edges with two equivalent Sr(3)N5 trigonal bipyramids. The Sr(3)-N(3) bond length is 2.84 Å. There is one shorter (2.47 Å) and one longer (2.57 Å) Sr(3)-N(1) bond length. There is one shorter (2.56 Å) and one longer (2.78 Å) Sr(3)-N(4) bond length. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(2), one N(3), one N(4), and two equivalent N(1) atoms. The Sr(4)-N(2) bond length is 2.83 Å. The Sr(4)-N(3) bond length is 2.85 Å. The Sr(4)-N(4) bond length is 2.85 Å. There is one shorter (2.52 Å) and one longer (2.68 Å) Sr(4)-N(1) bond length. Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form GeN4 tetrahedra that share corners with three equivalent Sr(2)N5 trigonal bipyramids, corners with three equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and  an edgeedge with one Sr(3)N5 trigonal bipyramid. The Ge(1)-N(1) bond length is 1.95 Å. The Ge(1)-N(2) bond length is 1.95 Å. The Ge(1)-N(3) bond length is 1.93 Å. The Ge(1)-N(4) bond length is 1.93 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 Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ge(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Ge(1) atom.