W3AlO8 crystallizes in the triclinic P1 space group. There are three inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(2)O6 octahedra,  a cornercorner with one W(3)O6 octahedra, corners with two equivalent Al(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with three equivalent Al(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles are 26°. In the third W site, W(3) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Al(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles are 23°. Al(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form AlO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(3)O6 octahedra, and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-60°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one W(2) and one Al(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Al(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one W(1), one W(2), and one W(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one W(1), one W(2), one W(3), and one Al(1) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one W(1) and one W(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(3) and one Al(1) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one W(1), one W(2), and one W(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one W(1), one W(2), and one W(3) atom.
W3AlO8 crystallizes in the triclinic P1 space group. There are three inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(2)O6 octahedra,  a cornercorner with one W(3)O6 octahedra, corners with two equivalent Al(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. The W(1)-O(2) bond length is 2.13 Å. The W(1)-O(3) bond length is 2.09 Å. The W(1)-O(4) bond length is 2.30 Å. The W(1)-O(5) bond length is 2.00 Å. The W(1)-O(7) bond length is 2.03 Å. The W(1)-O(8) bond length is 2.14 Å. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with three equivalent Al(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles are 26°. The W(2)-O(1) bond length is 1.93 Å. The W(2)-O(2) bond length is 2.08 Å. The W(2)-O(3) bond length is 2.11 Å. The W(2)-O(4) bond length is 2.30 Å. The W(2)-O(7) bond length is 2.14 Å. The W(2)-O(8) bond length is 2.13 Å. In the third W site, W(3) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Al(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles are 23°. The W(3)-O(3) bond length is 2.02 Å. The W(3)-O(4) bond length is 2.18 Å. The W(3)-O(5) bond length is 1.94 Å. The W(3)-O(6) bond length is 1.88 Å. The W(3)-O(7) bond length is 2.11 Å. The W(3)-O(8) bond length is 2.07 Å. Al(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form AlO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(3)O6 octahedra, and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-60°. The Al(1)-O(1) bond length is 1.73 Å. The Al(1)-O(2) bond length is 1.81 Å. The Al(1)-O(4) bond length is 1.87 Å. The Al(1)-O(6) bond length is 1.78 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one W(2) and one Al(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Al(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one W(1), one W(2), and one W(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one W(1), one W(2), one W(3), and one Al(1) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one W(1) and one W(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(3) and one Al(1) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one W(1), one W(2), and one W(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one W(1), one W(2), and one W(3) atom.