Sr3(CrN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(1) and four equivalent N(2) atoms. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of corner and edge-sharing CrN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 7-coordinate geometry to one Sr(2), four equivalent Sr(1), and two equivalent Cr(1) atoms. In the second N site, N(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms.
Sr3(CrN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. There is one shorter (2.60 Å) and one longer (2.89 Å) Sr(1)-N(2) bond length. There are a spread of Sr(1)-N(1) bond distances ranging from 2.68-3.01 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(1) and four equivalent N(2) atoms. Both Sr(2)-N(1) bond lengths are 2.73 Å. There are two shorter (2.56 Å) and two longer (2.80 Å) Sr(2)-N(2) bond lengths. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of corner and edge-sharing CrN4 tetrahedra. There is one shorter (1.91 Å) and one longer (1.97 Å) Cr(1)-N(1) bond length. There is one shorter (1.87 Å) and one longer (1.89 Å) Cr(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 Sr(2), four equivalent Sr(1), and two equivalent Cr(1) atoms. In the second N site, N(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms.