Sr3Ga2N4 crystallizes in the orthorhombic Pnna 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(1) and four equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to one N(2) and three equivalent N(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing GaN4 tetrahedra. In the second Ga site, Ga(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing GaN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(1), three equivalent Sr(2), one Ga(1), and one Ga(2) atom. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one Ga(1), and one Ga(2) atom.
Sr3Ga2N4 crystallizes in the orthorhombic Pnna 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(1) and four equivalent N(2) atoms. Both Sr(1)-N(1) bond lengths are 2.90 Å. There are two shorter (2.70 Å) and two longer (2.71 Å) Sr(1)-N(2) bond lengths. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to one N(2) and three equivalent N(1) atoms. The Sr(2)-N(2) bond length is 2.50 Å. There are a spread of Sr(2)-N(1) bond distances ranging from 2.57-2.77 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing GaN4 tetrahedra. Both Ga(1)-N(1) bond lengths are 1.99 Å. Both Ga(1)-N(2) bond lengths are 2.04 Å. In the second Ga site, Ga(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing GaN4 tetrahedra. Both Ga(2)-N(1) bond lengths are 2.00 Å. Both Ga(2)-N(2) bond lengths are 1.96 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Sr(1), three equivalent Sr(2), one Ga(1), and one Ga(2) atom. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one Ga(1), and one Ga(2) atom.