CoGe7N10 crystallizes in the monoclinic Pc space group. Co(1) is bonded in a distorted see-saw-like geometry to one N(1), one N(3), one N(4), and one N(7) atom. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(6) atom to form a mixture of edge and corner-sharing GeN4 tetrahedra. In the second Ge site, Ge(2) is bonded to one N(2), one N(3), one N(4), and one N(6) atom to form a mixture of edge and corner-sharing GeN4 tetrahedra. In the third Ge site, Ge(3) is bonded to one N(4), one N(5), one N(7), and one N(8) atom to form corner-sharing GeN4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one N(10), one N(2), one N(7), and one N(9) atom to form corner-sharing GeN4 tetrahedra. In the fifth Ge site, Ge(5) is bonded to one N(1), one N(7), one N(8), and one N(9) atom to form corner-sharing GeN4 tetrahedra. In the sixth Ge site, Ge(6) is bonded to one N(10), one N(3), one N(5), and one N(8) atom to form corner-sharing GeN4 tetrahedra. In the seventh Ge site, Ge(7) is bonded to one N(10), one N(5), one N(6), and one N(9) atom to form corner-sharing GeN4 tetrahedra. There are ten inequivalent N sites. In the first N site, N(9) is bonded in a trigonal non-coplanar geometry to one Ge(4), one Ge(5), and one Ge(7) atom. In the second N site, N(10) is bonded in a trigonal planar geometry to one Ge(4), one Ge(6), and one Ge(7) atom. In the third N site, N(1) is bonded in a 3-coordinate geometry to one Co(1), one Ge(1), and one Ge(5) atom. In the fourth N site, N(2) is bonded in a distorted trigonal planar geometry to one Ge(1), one Ge(2), and one Ge(4) atom. In the fifth N site, N(3) is bonded to one Co(1), one Ge(1), one Ge(2), and one Ge(6) atom to form distorted corner-sharing NCoGe3 tetrahedra. In the sixth N site, N(4) is bonded in a distorted T-shaped geometry to one Co(1), one Ge(2), and one Ge(3) atom. In the seventh N site, N(5) is bonded in a trigonal planar geometry to one Ge(3), one Ge(6), and one Ge(7) atom. In the eighth N site, N(6) is bonded in a trigonal planar geometry to one Ge(1), one Ge(2), and one Ge(7) atom. In the ninth N site, N(7) is bonded to one Co(1), one Ge(3), one Ge(4), and one Ge(5) atom to form distorted corner-sharing NCoGe3 trigonal pyramids. In the tenth N site, N(8) is bonded in a trigonal planar geometry to one Ge(3), one Ge(5), and one Ge(6) atom.
CoGe7N10 crystallizes in the monoclinic Pc space group. Co(1) is bonded in a distorted see-saw-like geometry to one N(1), one N(3), one N(4), and one N(7) atom. The Co(1)-N(1) bond length is 2.11 Å. The Co(1)-N(3) bond length is 2.19 Å. The Co(1)-N(4) bond length is 1.96 Å. The Co(1)-N(7) bond length is 1.98 Å. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(6) atom to form a mixture of edge and corner-sharing GeN4 tetrahedra. The Ge(1)-N(1) bond length is 1.84 Å. The Ge(1)-N(2) bond length is 1.88 Å. The Ge(1)-N(3) bond length is 2.02 Å. The Ge(1)-N(6) bond length is 1.86 Å. In the second Ge site, Ge(2) is bonded to one N(2), one N(3), one N(4), and one N(6) atom to form a mixture of edge and corner-sharing GeN4 tetrahedra. The Ge(2)-N(2) bond length is 1.86 Å. The Ge(2)-N(3) bond length is 1.95 Å. The Ge(2)-N(4) bond length is 1.81 Å. The Ge(2)-N(6) bond length is 1.85 Å. In the third Ge site, Ge(3) is bonded to one N(4), one N(5), one N(7), and one N(8) atom to form corner-sharing GeN4 tetrahedra. The Ge(3)-N(4) bond length is 1.85 Å. The Ge(3)-N(5) bond length is 1.85 Å. The Ge(3)-N(7) bond length is 1.90 Å. The Ge(3)-N(8) bond length is 1.85 Å. In the fourth Ge site, Ge(4) is bonded to one N(10), one N(2), one N(7), and one N(9) atom to form corner-sharing GeN4 tetrahedra. The Ge(4)-N(10) bond length is 1.85 Å. The Ge(4)-N(2) bond length is 1.81 Å. The Ge(4)-N(7) bond length is 1.89 Å. The Ge(4)-N(9) bond length is 1.87 Å. In the fifth Ge site, Ge(5) is bonded to one N(1), one N(7), one N(8), and one N(9) atom to form corner-sharing GeN4 tetrahedra. The Ge(5)-N(1) bond length is 1.83 Å. The Ge(5)-N(7) bond length is 1.96 Å. The Ge(5)-N(8) bond length is 1.86 Å. The Ge(5)-N(9) bond length is 1.85 Å. In the sixth Ge site, Ge(6) is bonded to one N(10), one N(3), one N(5), and one N(8) atom to form corner-sharing GeN4 tetrahedra. The Ge(6)-N(10) bond length is 1.85 Å. The Ge(6)-N(3) bond length is 1.88 Å. The Ge(6)-N(5) bond length is 1.83 Å. The Ge(6)-N(8) bond length is 1.84 Å. In the seventh Ge site, Ge(7) is bonded to one N(10), one N(5), one N(6), and one N(9) atom to form corner-sharing GeN4 tetrahedra. The Ge(7)-N(10) bond length is 1.86 Å. The Ge(7)-N(5) bond length is 1.85 Å. The Ge(7)-N(6) bond length is 1.82 Å. The Ge(7)-N(9) bond length is 1.85 Å. There are ten inequivalent N sites. In the first N site, N(9) is bonded in a trigonal non-coplanar geometry to one Ge(4), one Ge(5), and one Ge(7) atom. In the second N site, N(10) is bonded in a trigonal planar geometry to one Ge(4), one Ge(6), and one Ge(7) atom. In the third N site, N(1) is bonded in a 3-coordinate geometry to one Co(1), one Ge(1), and one Ge(5) atom. In the fourth N site, N(2) is bonded in a distorted trigonal planar geometry to one Ge(1), one Ge(2), and one Ge(4) atom. In the fifth N site, N(3) is bonded to one Co(1), one Ge(1), one Ge(2), and one Ge(6) atom to form distorted corner-sharing NCoGe3 tetrahedra. In the sixth N site, N(4) is bonded in a distorted T-shaped geometry to one Co(1), one Ge(2), and one Ge(3) atom. In the seventh N site, N(5) is bonded in a trigonal planar geometry to one Ge(3), one Ge(6), and one Ge(7) atom. In the eighth N site, N(6) is bonded in a trigonal planar geometry to one Ge(1), one Ge(2), and one Ge(7) atom. In the ninth N site, N(7) is bonded to one Co(1), one Ge(3), one Ge(4), and one Ge(5) atom to form distorted corner-sharing NCoGe3 trigonal pyramids. In the tenth N site, N(8) is bonded in a trigonal planar geometry to one Ge(3), one Ge(5), and one Ge(6) atom.