Ca3(OsN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. In the second Ca site, Ca(2) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form distorted edge-sharing CaN6 octahedra. Os(1) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 7-coordinate geometry to one Ca(2), four equivalent Ca(1), and two equivalent Os(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Os(1) atoms.
Ca3(OsN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. There is one shorter (2.45 Å) and one longer (2.72 Å) Ca(1)-N(2) bond length. There are a spread of Ca(1)-N(1) bond distances ranging from 2.48-2.90 Å. In the second Ca site, Ca(2) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form distorted edge-sharing CaN6 octahedra. Both Ca(2)-N(1) bond lengths are 2.57 Å. There are two shorter (2.43 Å) and two longer (2.49 Å) Ca(2)-N(2) bond lengths. Os(1) is bonded in a 4-coordinate geometry to two equivalent N(1) and two equivalent N(2) atoms. There is one shorter (1.96 Å) and one longer (2.32 Å) Os(1)-N(1) bond length. There is one shorter (1.97 Å) and one longer (2.00 Å) Os(1)-N(2) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 7-coordinate geometry to one Ca(2), four equivalent Ca(1), and two equivalent Os(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), and two equivalent Os(1) atoms.