Ba3Y2WO9 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Immm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent O(1), two equivalent O(2), four equivalent O(3), and four equivalent O(5) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with ten equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Y(1)O6 octahedra, faces with two equivalent Y(2)O6 octahedra, faces with two equivalent Y(3)O6 octahedra, and faces with two equivalent W(1)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(1), two equivalent O(3), two equivalent O(5), three equivalent O(2), and four equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with five equivalent Ba(1)O12 cuboctahedra, corners with seven equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra,  a faceface with one Y(1)O6 octahedra,  a faceface with one Y(3)O6 octahedra, faces with three equivalent Y(2)O6 octahedra, and faces with three equivalent W(1)O6 octahedra. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form YO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Y site, Y(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form YO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the third Y site, Y(3) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Y(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. W(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Y(2)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Y(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(1), three equivalent Ba(2), one Y(2), and one W(1) atom. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Y(2), and one Y(3) atom to form a mixture of distorted edge, corner, and face-sharing OBa4Y2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(2), one Y(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one W(1) atom.
Ba3Y2WO9 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Immm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent O(1), two equivalent O(2), four equivalent O(3), and four equivalent O(5) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with ten equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Y(1)O6 octahedra, faces with two equivalent Y(2)O6 octahedra, faces with two equivalent Y(3)O6 octahedra, and faces with two equivalent W(1)O6 octahedra. Both Ba(1)-O(1) bond lengths are 3.03 Å. Both Ba(1)-O(2) bond lengths are 3.09 Å. All Ba(1)-O(3) bond lengths are 3.00 Å. All Ba(1)-O(5) bond lengths are 3.10 Å. In the second Ba site, Ba(2) is bonded to one O(1), two equivalent O(3), two equivalent O(5), three equivalent O(2), and four equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with five equivalent Ba(1)O12 cuboctahedra, corners with seven equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra,  a faceface with one Y(1)O6 octahedra,  a faceface with one Y(3)O6 octahedra, faces with three equivalent Y(2)O6 octahedra, and faces with three equivalent W(1)O6 octahedra. The Ba(2)-O(1) bond length is 2.93 Å. Both Ba(2)-O(3) bond lengths are 2.88 Å. Both Ba(2)-O(5) bond lengths are 3.06 Å. There are two shorter (3.04 Å) and one longer (3.06 Å) Ba(2)-O(2) bond length. There are two shorter (3.07 Å) and two longer (3.09 Å) Ba(2)-O(4) bond lengths. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form YO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Y(1)-O(1) bond lengths are 2.11 Å. All Y(1)-O(5) bond lengths are 2.32 Å. In the second Y site, Y(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form YO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with four equivalent W(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-2°. Both Y(2)-O(2) bond lengths are 2.34 Å. Both Y(2)-O(3) bond lengths are 2.12 Å. Both Y(2)-O(4) bond lengths are 2.29 Å. In the third Y site, Y(3) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form YO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Y(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. Both Y(3)-O(1) bond lengths are 2.17 Å. All Y(3)-O(3) bond lengths are 2.22 Å. W(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent Y(1)O6 octahedra, corners with four equivalent Y(2)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. Both W(1)-O(2) bond lengths are 1.95 Å. Both W(1)-O(4) bond lengths are 1.93 Å. Both W(1)-O(5) bond lengths are 1.94 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one Y(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(1), three equivalent Ba(2), one Y(2), and one W(1) atom. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Y(2), and one Y(3) atom to form a mixture of distorted edge, corner, and face-sharing OBa4Y2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(2), one Y(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Y(1), and one W(1) atom.