Sr3(WN2)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 5-coordinate geometry to two equivalent 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 W sites. In the first W site, W(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing WN4 tetrahedra. In the second W site, W(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing WN4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one W(1), and one W(2) atom. In the second N site, N(2) is bonded to one Sr(2), three equivalent Sr(1), one W(1), and one W(2) atom to form a mixture of distorted edge, face, and corner-sharing NSr4W2 octahedra. The corner-sharing octahedral tilt angles range from 37-66°.
Sr3(WN2)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 5-coordinate geometry to two equivalent N(1) and three equivalent N(2) atoms. There is one shorter (2.69 Å) and one longer (3.12 Å) Sr(1)-N(1) bond length. There are a spread of Sr(1)-N(2) bond distances ranging from 2.60-2.80 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 2.95 Å. There are two shorter (2.81 Å) and two longer (3.01 Å) Sr(2)-N(1) bond lengths. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing WN4 tetrahedra. Both W(1)-N(1) bond lengths are 2.01 Å. Both W(1)-N(2) bond lengths are 1.97 Å. In the second W site, W(2) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form distorted edge-sharing WN4 tetrahedra. Both W(2)-N(1) bond lengths are 2.03 Å. Both W(2)-N(2) bond lengths are 2.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one W(1), and one W(2) atom. In the second N site, N(2) is bonded to one Sr(2), three equivalent Sr(1), one W(1), and one W(2) atom to form a mixture of distorted edge, face, and corner-sharing NSr4W2 octahedra. The corner-sharing octahedral tilt angles range from 37-66°.