Sr3(WN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form distorted SrN6 octahedra that share corners with two equivalent Sr(1)N6 octahedra, corners with six equivalent W(1)N4 tetrahedra, edges with six equivalent Sr(1)N6 octahedra, and edges with three equivalent W(1)N4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. 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. W(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted WN4 tetrahedra that share corners with six equivalent Sr(1)N6 octahedra, corners with two equivalent W(1)N4 tetrahedra, edges with three equivalent Sr(1)N6 octahedra, and  an edgeedge with one W(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-76°. 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 W(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent W(1) atoms.
Sr3(WN2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form distorted SrN6 octahedra that share corners with two equivalent Sr(1)N6 octahedra, corners with six equivalent W(1)N4 tetrahedra, edges with six equivalent Sr(1)N6 octahedra, and edges with three equivalent W(1)N4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. There is one shorter (2.67 Å) and one longer (2.86 Å) Sr(1)-N(2) bond length. There are a spread of Sr(1)-N(1) bond distances ranging from 2.71-3.00 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 2.92 Å. There are two shorter (2.69 Å) and two longer (2.78 Å) Sr(2)-N(2) bond lengths. W(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted WN4 tetrahedra that share corners with six equivalent Sr(1)N6 octahedra, corners with two equivalent W(1)N4 tetrahedra, edges with three equivalent Sr(1)N6 octahedra, and  an edgeedge with one W(1)N4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-76°. There is one shorter (2.06 Å) and one longer (2.08 Å) W(1)-N(1) bond length. There is one shorter (1.97 Å) and one longer (2.01 Å) W(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 W(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent W(1) atoms.