Sr3(ReN2)2 crystallizes in the orthorhombic Pnna space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 4-coordinate geometry to one N(1) and three equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form edge-sharing ReN4 tetrahedra. In the second Re site, Re(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing ReN4 trigonal pyramids. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one Re(1), and one Re(2) atom. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), one Re(1), and one Re(2) atom.
Sr3(ReN2)2 crystallizes in the orthorhombic Pnna space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 4-coordinate geometry to one N(1) and three equivalent N(2) atoms. The Sr(1)-N(1) bond length is 2.52 Å. There are a spread of Sr(1)-N(2) bond distances ranging from 2.59-2.71 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent N(2) and four equivalent N(1) atoms. Both Sr(2)-N(2) bond lengths are 3.01 Å. There are two shorter (2.73 Å) and two longer (2.87 Å) Sr(2)-N(1) bond lengths. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form edge-sharing ReN4 tetrahedra. Both Re(1)-N(1) bond lengths are 1.95 Å. Both Re(1)-N(2) bond lengths are 1.97 Å. In the second Re site, Re(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing ReN4 trigonal pyramids. Both Re(2)-N(1) bond lengths are 2.17 Å. Both Re(2)-N(2) bond lengths are 2.05 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one Sr(1), two equivalent Sr(2), one Re(1), and one Re(2) atom. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), one Re(1), and one Re(2) atom.