Ca5(CoN2)2 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. Co(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to one Ca(1), four equivalent Ca(2), and one Co(1) atom to form a mixture of distorted corner and edge-sharing NCa5Co octahedra. The corner-sharing octahedral tilt angles range from 2-22°.
Ca5(CoN2)2 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. All Ca(1)-N(1) bond lengths are 2.62 Å. In the second Ca site, Ca(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. There are a spread of Ca(2)-N(1) bond distances ranging from 2.39-2.62 Å. Co(1) is bonded in a linear geometry to two equivalent N(1) atoms. Both Co(1)-N(1) bond lengths are 1.80 Å. N(1) is bonded to one Ca(1), four equivalent Ca(2), and one Co(1) atom to form a mixture of distorted corner and edge-sharing NCa5Co octahedra. The corner-sharing octahedral tilt angles range from 2-22°.