KEuWSbO6 crystallizes in the orthorhombic Pnnn space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. In the second K site, K(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. In the second Eu site, Eu(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form EuO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form WO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent W(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom.
KEuWSbO6 crystallizes in the orthorhombic Pnnn space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All K(1)-O(1) bond lengths are 3.04 Å. All K(1)-O(2) bond lengths are 2.83 Å. All K(1)-O(3) bond lengths are 3.20 Å. In the second K site, K(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All K(2)-O(1) bond lengths are 2.87 Å. All K(2)-O(2) bond lengths are 3.13 Å. All K(2)-O(3) bond lengths are 3.05 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(2)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Eu(1)-O(1) bond lengths are 3.09 Å. All Eu(1)-O(2) bond lengths are 2.99 Å. All Eu(1)-O(3) bond lengths are 2.75 Å. In the second Eu site, Eu(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form EuO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Eu(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, faces with four equivalent W(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Eu(2)-O(1) bond lengths are 2.93 Å. All Eu(2)-O(2) bond lengths are 2.98 Å. All Eu(2)-O(3) bond lengths are 2.92 Å. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form WO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both W(1)-O(1) bond lengths are 1.96 Å. Both W(1)-O(2) bond lengths are 1.95 Å. Both W(1)-O(3) bond lengths are 1.97 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent W(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Sb(1)-O(1) bond lengths are 2.26 Å. Both Sb(1)-O(2) bond lengths are 2.26 Å. Both Sb(1)-O(3) bond lengths are 2.27 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(1), one K(2), one Eu(1), one Eu(2), one W(1), and one Sb(1) atom.