WAlN3 crystallizes in the triclinic P-1 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form distorted WN4 tetrahedra that share  a cornercorner with one W(2)N4 tetrahedra,  a cornercorner with one Al(1)N4 tetrahedra,  a cornercorner with one Al(2)N4 trigonal pyramid, and  an edgeedge with one W(1)N4 tetrahedra. In the second W site, W(2) is bonded to one N(1), one N(4), one N(5), and one N(6) atom to form WN4 tetrahedra that share  a cornercorner with one W(1)N4 tetrahedra, corners with four equivalent Al(1)N4 tetrahedra,  a cornercorner with one Al(2)N4 trigonal pyramid, and  an edgeedge with one Al(2)N4 trigonal pyramid. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one N(1), one N(4), one N(5), and one N(6) atom to form AlN4 tetrahedra that share  a cornercorner with one W(1)N4 tetrahedra, corners with four equivalent W(2)N4 tetrahedra, and corners with three equivalent Al(2)N4 trigonal pyramids. In the second Al site, Al(2) is bonded to one N(3), one N(4), one N(5), and one N(6) atom to form distorted AlN4 trigonal pyramids that share  a cornercorner with one W(1)N4 tetrahedra,  a cornercorner with one W(2)N4 tetrahedra, corners with three equivalent Al(1)N4 tetrahedra, and  an edgeedge with one W(2)N4 tetrahedra. There are six inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one W(1), one W(2), and one Al(1) atom. In the second N site, N(2) is bonded in an L-shaped geometry to two equivalent W(1) atoms. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one W(1) and one Al(2) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one W(2), one Al(1), and one Al(2) atom. In the fifth N site, N(5) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one Al(1), and one Al(2) atom. In the sixth N site, N(6) is bonded in a distorted T-shaped geometry to one W(2), one Al(1), and one Al(2) atom.
WAlN3 crystallizes in the triclinic P-1 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form distorted WN4 tetrahedra that share  a cornercorner with one W(2)N4 tetrahedra,  a cornercorner with one Al(1)N4 tetrahedra,  a cornercorner with one Al(2)N4 trigonal pyramid, and  an edgeedge with one W(1)N4 tetrahedra. The W(1)-N(1) bond length is 2.02 Å. The W(1)-N(3) bond length is 1.79 Å. There is one shorter (1.86 Å) and one longer (1.91 Å) W(1)-N(2) bond length. In the second W site, W(2) is bonded to one N(1), one N(4), one N(5), and one N(6) atom to form WN4 tetrahedra that share  a cornercorner with one W(1)N4 tetrahedra, corners with four equivalent Al(1)N4 tetrahedra,  a cornercorner with one Al(2)N4 trigonal pyramid, and  an edgeedge with one Al(2)N4 trigonal pyramid. The W(2)-N(1) bond length is 1.91 Å. The W(2)-N(4) bond length is 1.86 Å. The W(2)-N(5) bond length is 1.89 Å. The W(2)-N(6) bond length is 1.86 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one N(1), one N(4), one N(5), and one N(6) atom to form AlN4 tetrahedra that share  a cornercorner with one W(1)N4 tetrahedra, corners with four equivalent W(2)N4 tetrahedra, and corners with three equivalent Al(2)N4 trigonal pyramids. The Al(1)-N(1) bond length is 1.92 Å. The Al(1)-N(4) bond length is 1.89 Å. The Al(1)-N(5) bond length is 1.92 Å. The Al(1)-N(6) bond length is 1.89 Å. In the second Al site, Al(2) is bonded to one N(3), one N(4), one N(5), and one N(6) atom to form distorted AlN4 trigonal pyramids that share  a cornercorner with one W(1)N4 tetrahedra,  a cornercorner with one W(2)N4 tetrahedra, corners with three equivalent Al(1)N4 tetrahedra, and  an edgeedge with one W(2)N4 tetrahedra. The Al(2)-N(3) bond length is 1.80 Å. The Al(2)-N(4) bond length is 1.90 Å. The Al(2)-N(5) bond length is 1.93 Å. The Al(2)-N(6) bond length is 2.03 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one W(1), one W(2), and one Al(1) atom. In the second N site, N(2) is bonded in an L-shaped geometry to two equivalent W(1) atoms. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one W(1) and one Al(2) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one W(2), one Al(1), and one Al(2) atom. In the fifth N site, N(5) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one Al(1), and one Al(2) atom. In the sixth N site, N(6) is bonded in a distorted T-shaped geometry to one W(2), one Al(1), and one Al(2) atom.