Ta(WO4)2 crystallizes in the monoclinic P2/c space group. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with eight equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ta(1) and one W(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ta(1) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ta(1) and one W(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent W(1) atoms.
Ta(WO4)2 crystallizes in the monoclinic P2/c space group. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with eight equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. Both Ta(1)-O(1) bond lengths are 1.96 Å. Both Ta(1)-O(2) bond lengths are 2.22 Å. Both Ta(1)-O(3) bond lengths are 1.91 Å. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. The W(1)-O(1) bond length is 1.90 Å. The W(1)-O(3) bond length is 1.94 Å. There is one shorter (2.01 Å) and one longer (2.15 Å) W(1)-O(2) bond length. There is one shorter (1.90 Å) and one longer (2.03 Å) W(1)-O(4) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ta(1) and one W(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ta(1) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ta(1) and one W(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent W(1) atoms.