Ca2YAs(WO6)2 crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Y(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted WO6 tetrahedra that share corners with two equivalent As(1)O4 tetrahedra. As(1) is bonded to four equivalent O(1) atoms to form AsO4 tetrahedra that share corners with four equivalent W(1)O6 tetrahedra. There are three inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to one Ca(1), one Y(1), and one W(1) atom. In the second O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one W(1) atom. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Y(1), one W(1), and one As(1) atom.
Ca2YAs(WO6)2 crystallizes in the tetragonal I4_1/a space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Ca(1)-O(1) bond lengths are 2.81 Å. Both Ca(1)-O(2) bond lengths are 2.35 Å. There are two shorter (2.45 Å) and two longer (2.48 Å) Ca(1)-O(3) bond lengths. Y(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All Y(1)-O(1) bond lengths are 2.41 Å. All Y(1)-O(2) bond lengths are 2.34 Å. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted WO6 tetrahedra that share corners with two equivalent As(1)O4 tetrahedra. Both W(1)-O(1) bond lengths are 2.47 Å. Both W(1)-O(2) bond lengths are 1.87 Å. Both W(1)-O(3) bond lengths are 1.82 Å. As(1) is bonded to four equivalent O(1) atoms to form AsO4 tetrahedra that share corners with four equivalent W(1)O6 tetrahedra. All As(1)-O(1) bond lengths are 1.74 Å. There are three inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to one Ca(1), one Y(1), and one W(1) atom. In the second O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one W(1) atom. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Y(1), one W(1), and one As(1) atom.