BaYW4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(1) atoms. Y(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form distorted YO6 octahedra that share corners with three equivalent W(2)O4 trigonal pyramids. There are two inequivalent W sites. In the first W site, W(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(3) atoms. In the second W site, W(2) is bonded to one O(2) and three equivalent O(1) atoms to form WO4 trigonal pyramids that share corners with three equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 42°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Y(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one W(2) and three equivalent W(1) atoms. In the third O site, O(3) is bonded to one Ba(1), one Y(1), and two equivalent W(1) atoms to form a mixture of edge and corner-sharing OBaYW2 tetrahedra.
BaYW4O7 crystallizes in the hexagonal P6_3mc space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(1) atoms. All Ba(1)-O(3) bond lengths are 2.70 Å. All Ba(1)-O(1) bond lengths are 3.19 Å. Y(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form distorted YO6 octahedra that share corners with three equivalent W(2)O4 trigonal pyramids. All Y(1)-O(1) bond lengths are 2.30 Å. All Y(1)-O(3) bond lengths are 2.21 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(3) atoms. The W(1)-O(1) bond length is 2.11 Å. The W(1)-O(2) bond length is 2.29 Å. Both W(1)-O(3) bond lengths are 2.14 Å. In the second W site, W(2) is bonded to one O(2) and three equivalent O(1) atoms to form WO4 trigonal pyramids that share corners with three equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 42°. The W(2)-O(2) bond length is 2.31 Å. All W(2)-O(1) bond lengths are 1.98 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Y(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one W(2) and three equivalent W(1) atoms. In the third O site, O(3) is bonded to one Ba(1), one Y(1), and two equivalent W(1) atoms to form a mixture of edge and corner-sharing OBaYW2 tetrahedra.