KSrCeSbO6 is (Cubic) Perovskite-derived structured and 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 KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(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 Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. Ce(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CeO6 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 Sr(1)O12 cuboctahedra, and faces with two equivalent Sr(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 Ce(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with two equivalent Sr(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 Sr(1), one Sr(2), one Ce(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sr(1), one Sr(2), one Ce(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 Sr(1), one Sr(2), one Ce(1), and one Sb(1) atom.
KSrCeSbO6 is (Cubic) Perovskite-derived structured and 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 KO12 cuboctahedra that share corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All K(1)-O(1) bond lengths are 3.07 Å. All K(1)-O(2) bond lengths are 2.89 Å. All K(1)-O(3) bond lengths are 3.14 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 Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All K(2)-O(1) bond lengths are 3.22 Å. All K(2)-O(2) bond lengths are 3.06 Å. All K(2)-O(3) bond lengths are 2.84 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Sr(1)-O(1) bond lengths are 2.76 Å. All Sr(1)-O(2) bond lengths are 3.09 Å. All Sr(1)-O(3) bond lengths are 3.00 Å. In the second Sr site, Sr(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with four equivalent K(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Sr(2)-O(1) bond lengths are 2.93 Å. All Sr(2)-O(2) bond lengths are 2.93 Å. All Sr(2)-O(3) bond lengths are 2.99 Å. Ce(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CeO6 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 Sr(1)O12 cuboctahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Ce(1)-O(1) bond lengths are 2.24 Å. Both Ce(1)-O(2) bond lengths are 2.22 Å. Both Ce(1)-O(3) bond lengths are 2.22 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 Ce(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, faces with two equivalent K(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Sb(1)-O(1) bond lengths are 2.02 Å. Both Sb(1)-O(2) bond lengths are 2.01 Å. Both Sb(1)-O(3) bond lengths are 2.01 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 Sr(1), one Sr(2), one Ce(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Sr(1), one Sr(2), one Ce(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 Sr(1), one Sr(2), one Ce(1), and one Sb(1) atom.