K3Y(VO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. Y(1) is bonded to six equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 17°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), two equivalent K(1), one Y(1), and one V(1) atom.
K3Y(VO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. The K(1)-O(1) bond length is 2.58 Å. All K(1)-O(2) bond lengths are 3.02 Å. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. All K(2)-O(2) bond lengths are 3.14 Å. Y(1) is bonded to six equivalent O(2) atoms to form YO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra. All Y(1)-O(2) bond lengths are 2.26 Å. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra. The corner-sharing octahedral tilt angles are 17°. The V(1)-O(1) bond length is 1.68 Å. All V(1)-O(2) bond lengths are 1.77 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), two equivalent K(1), one Y(1), and one V(1) atom.