CuAl(WO4)2 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted WO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-60°. Cu(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CuO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-60°. Al(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form AlO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-54°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(1), and one Al(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cu(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(1), and one Al(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent W(1) and one Al(1) atom.
CuAl(WO4)2 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted WO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-60°. The W(1)-O(1) bond length is 1.85 Å. The W(1)-O(3) bond length is 1.86 Å. There is one shorter (1.90 Å) and one longer (2.13 Å) W(1)-O(2) bond length. There is one shorter (2.03 Å) and one longer (2.10 Å) W(1)-O(4) bond length. Cu(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CuO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-60°. Both Cu(1)-O(1) bond lengths are 2.21 Å. Both Cu(1)-O(2) bond lengths are 2.04 Å. Both Cu(1)-O(3) bond lengths are 2.18 Å. Al(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form AlO6 octahedra that share corners with eight equivalent W(1)O6 octahedra and edges with two equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-54°. Both Al(1)-O(1) bond lengths are 1.96 Å. Both Al(1)-O(3) bond lengths are 1.89 Å. Both Al(1)-O(4) bond lengths are 1.99 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(1), and one Al(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent W(1) and one Cu(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(1), and one Al(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent W(1) and one Al(1) atom.