Sr2CoNbO6 is (Cubic) Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(13), one O(14), one O(2), one O(21), one O(22), two equivalent O(17), two equivalent O(5), and two equivalent O(9) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(2)O12 cuboctahedra, corners with three equivalent Sr(3)O12 cuboctahedra, corners with six equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(6)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(14), one O(16), one O(2), one O(22), one O(24), one O(4), two equivalent O(10), two equivalent O(18), and two equivalent O(6) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent Sr(4)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(6)O12 cuboctahedra, faces with three equivalent Sr(8)O12 cuboctahedra,  a faceface with one Nb(4)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(4)O6 octahedra. In the third Sr site, Sr(3) is bonded to one O(1), one O(13), one O(15), one O(21), one O(23), one O(3), two equivalent O(11), two equivalent O(19), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent Sr(4)O12 cuboctahedra, corners with six equivalent Sr(3)O12 cuboctahedra, faces with three equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(7)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(3)O6 octahedra, faces with three equivalent Nb(3)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. In the fourth Sr site, Sr(4) is bonded to one O(15), one O(16), one O(23), one O(24), one O(3), one O(4), two equivalent O(12), two equivalent O(20), and two equivalent O(8) atoms to form distorted SrO12 cuboctahedra that share corners with three equivalent Sr(2)O12 cuboctahedra, corners with three equivalent Sr(3)O12 cuboctahedra, corners with six equivalent Sr(4)O12 cuboctahedra, faces with three equivalent Sr(7)O12 cuboctahedra, faces with three equivalent Sr(8)O12 cuboctahedra,  a faceface with one Nb(3)O6 octahedra,  a faceface with one Co(4)O6 octahedra, faces with three equivalent Nb(4)O6 octahedra, and faces with three equivalent Co(3)O6 octahedra. In the fifth Sr site, Sr(5) is bonded to one O(11), one O(17), one O(19), one O(5), one O(7), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent O(21) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(6)O12 cuboctahedra, corners with three equivalent Sr(7)O12 cuboctahedra, corners with six equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra,  a faceface with one Nb(3)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. In the sixth Sr site, Sr(6) is bonded to one O(10), one O(17), one O(18), one O(5), one O(6), one O(9), two equivalent O(14), two equivalent O(2), and two equivalent O(22) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(5)O12 cuboctahedra, corners with three equivalent Sr(8)O12 cuboctahedra, corners with six equivalent Sr(6)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(4)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. In the seventh Sr site, Sr(7) is bonded to one O(11), one O(12), one O(19), one O(20), one O(7), one O(8), two equivalent O(15), two equivalent O(23), and two equivalent O(3) atoms to form distorted SrO12 cuboctahedra that share corners with three equivalent Sr(5)O12 cuboctahedra, corners with three equivalent Sr(8)O12 cuboctahedra, corners with six equivalent Sr(7)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra,  a faceface with one Nb(4)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(3)O6 octahedra, and faces with three equivalent Co(3)O6 octahedra. In the eighth Sr site, Sr(8) is bonded to one O(10), one O(12), one O(18), one O(20), one O(6), one O(8), two equivalent O(16), two equivalent O(24), and two equivalent O(4) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(6)O12 cuboctahedra, corners with three equivalent Sr(7)O12 cuboctahedra, corners with six equivalent Sr(8)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(3)O6 octahedra, faces with three equivalent Nb(4)O6 octahedra, and faces with three equivalent Co(4)O6 octahedra. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(13), one O(17), one O(21), one O(5), and one O(9) atom to form NbO6 octahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra,  a faceface with one Sr(3)O12 cuboctahedra,  a faceface with one Sr(6)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with three equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the second Nb site, Nb(2) is bonded to one O(10), one O(14), one O(18), one O(2), one O(22), and one O(6) atom to form NbO6 octahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(4)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(8)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, and faces with three equivalent Sr(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-7°. In the third Nb site, Nb(3) is bonded to one O(11), one O(15), one O(19), one O(23), one O(3), and one O(7) atom to form NbO6 octahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(3)O6 octahedra,  a faceface with one Sr(4)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, and faces with three equivalent Sr(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fourth Nb site, Nb(4) is bonded to one O(12), one O(16), one O(20), one O(24), one O(4), and one O(8) atom to form NbO6 octahedra that share corners with three equivalent Co(3)O6 octahedra, corners with three equivalent Co(4)O6 octahedra,  a faceface with one Sr(2)O12 cuboctahedra,  a faceface with one Sr(7)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra, and faces with three equivalent Sr(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-11°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(11), one O(13), one O(19), one O(21), and one O(7) atom to form CoO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra, corners with three equivalent Nb(3)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(7)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, and faces with three equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second Co site, Co(2) is bonded to one O(14), one O(17), one O(2), one O(22), one O(5), and one O(9) atom to form CoO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  a faceface with one Sr(2)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with three equivalent Sr(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-8°. In the third Co site, Co(3) is bonded to one O(12), one O(15), one O(20), one O(23), one O(3), and one O(8) atom to form CoO6 octahedra that share corners with three equivalent Nb(3)O6 octahedra, corners with three equivalent Nb(4)O6 octahedra,  a faceface with one Sr(3)O12 cuboctahedra,  a faceface with one Sr(8)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra, and faces with three equivalent Sr(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-11°. In the fourth Co site, Co(4) is bonded to one O(10), one O(16), one O(18), one O(24), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with three equivalent Nb(2)O6 octahedra, corners with three equivalent Nb(4)O6 octahedra,  a faceface with one Sr(4)O12 cuboctahedra,  a faceface with one Sr(6)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, and faces with three equivalent Sr(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-7°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom to form a mixture of distorted corner and face-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the third O site, O(3) is bonded to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom to form distorted corner-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the tenth O site, O(10) is bonded to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom to form distorted corner-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles are 3°. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom to form a mixture of distorted corner and face-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom. In the nineteenth O site, O(19) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the twenty-third O site, O(23) is bonded in a 2-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom. In the twenty-fourth O site, O(24) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom.
Sr2CoNbO6 is (Cubic) Perovskite-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(13), one O(14), one O(2), one O(21), one O(22), two equivalent O(17), two equivalent O(5), and two equivalent O(9) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(2)O12 cuboctahedra, corners with three equivalent Sr(3)O12 cuboctahedra, corners with six equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(6)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. The Sr(1)-O(1) bond length is 2.75 Å. The Sr(1)-O(13) bond length is 2.80 Å. The Sr(1)-O(14) bond length is 2.97 Å. The Sr(1)-O(2) bond length is 2.68 Å. The Sr(1)-O(21) bond length is 2.78 Å. The Sr(1)-O(22) bond length is 2.90 Å. There is one shorter (2.77 Å) and one longer (2.90 Å) Sr(1)-O(17) bond length. There is one shorter (2.80 Å) and one longer (2.83 Å) Sr(1)-O(5) bond length. There is one shorter (2.74 Å) and one longer (2.90 Å) Sr(1)-O(9) bond length. In the second Sr site, Sr(2) is bonded to one O(14), one O(16), one O(2), one O(22), one O(24), one O(4), two equivalent O(10), two equivalent O(18), and two equivalent O(6) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent Sr(4)O12 cuboctahedra, corners with six equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(6)O12 cuboctahedra, faces with three equivalent Sr(8)O12 cuboctahedra,  a faceface with one Nb(4)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(4)O6 octahedra. The Sr(2)-O(14) bond length is 2.73 Å. The Sr(2)-O(16) bond length is 2.77 Å. The Sr(2)-O(2) bond length is 2.95 Å. The Sr(2)-O(22) bond length is 2.78 Å. The Sr(2)-O(24) bond length is 2.81 Å. The Sr(2)-O(4) bond length is 2.95 Å. There is one shorter (2.73 Å) and one longer (2.91 Å) Sr(2)-O(10) bond length. There is one shorter (2.74 Å) and one longer (2.93 Å) Sr(2)-O(18) bond length. There is one shorter (2.80 Å) and one longer (2.82 Å) Sr(2)-O(6) bond length. In the third Sr site, Sr(3) is bonded to one O(1), one O(13), one O(15), one O(21), one O(23), one O(3), two equivalent O(11), two equivalent O(19), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent Sr(4)O12 cuboctahedra, corners with six equivalent Sr(3)O12 cuboctahedra, faces with three equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(7)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(3)O6 octahedra, faces with three equivalent Nb(3)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. The Sr(3)-O(1) bond length is 2.79 Å. The Sr(3)-O(13) bond length is 2.77 Å. The Sr(3)-O(15) bond length is 2.90 Å. The Sr(3)-O(21) bond length is 2.80 Å. The Sr(3)-O(23) bond length is 2.66 Å. The Sr(3)-O(3) bond length is 2.87 Å. There is one shorter (2.80 Å) and one longer (2.85 Å) Sr(3)-O(11) bond length. There is one shorter (2.82 Å) and one longer (2.84 Å) Sr(3)-O(19) bond length. There is one shorter (2.80 Å) and one longer (2.82 Å) Sr(3)-O(7) bond length. In the fourth Sr site, Sr(4) is bonded to one O(15), one O(16), one O(23), one O(24), one O(3), one O(4), two equivalent O(12), two equivalent O(20), and two equivalent O(8) atoms to form distorted SrO12 cuboctahedra that share corners with three equivalent Sr(2)O12 cuboctahedra, corners with three equivalent Sr(3)O12 cuboctahedra, corners with six equivalent Sr(4)O12 cuboctahedra, faces with three equivalent Sr(7)O12 cuboctahedra, faces with three equivalent Sr(8)O12 cuboctahedra,  a faceface with one Nb(3)O6 octahedra,  a faceface with one Co(4)O6 octahedra, faces with three equivalent Nb(4)O6 octahedra, and faces with three equivalent Co(3)O6 octahedra. The Sr(4)-O(15) bond length is 2.70 Å. The Sr(4)-O(16) bond length is 2.90 Å. The Sr(4)-O(23) bond length is 3.03 Å. The Sr(4)-O(24) bond length is 2.88 Å. The Sr(4)-O(3) bond length is 2.76 Å. The Sr(4)-O(4) bond length is 2.74 Å. There is one shorter (2.68 Å) and one longer (2.96 Å) Sr(4)-O(12) bond length. Both Sr(4)-O(20) bond lengths are 2.84 Å. There is one shorter (2.70 Å) and one longer (2.92 Å) Sr(4)-O(8) bond length. In the fifth Sr site, Sr(5) is bonded to one O(11), one O(17), one O(19), one O(5), one O(7), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent O(21) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(6)O12 cuboctahedra, corners with three equivalent Sr(7)O12 cuboctahedra, corners with six equivalent Sr(5)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra,  a faceface with one Nb(3)O6 octahedra,  a faceface with one Co(2)O6 octahedra, faces with three equivalent Nb(1)O6 octahedra, and faces with three equivalent Co(1)O6 octahedra. The Sr(5)-O(11) bond length is 2.76 Å. The Sr(5)-O(17) bond length is 2.75 Å. The Sr(5)-O(19) bond length is 2.85 Å. The Sr(5)-O(5) bond length is 2.89 Å. The Sr(5)-O(7) bond length is 2.79 Å. The Sr(5)-O(9) bond length is 2.71 Å. There is one shorter (2.80 Å) and one longer (2.82 Å) Sr(5)-O(1) bond length. There is one shorter (2.82 Å) and one longer (2.83 Å) Sr(5)-O(13) bond length. There is one shorter (2.82 Å) and one longer (2.84 Å) Sr(5)-O(21) bond length. In the sixth Sr site, Sr(6) is bonded to one O(10), one O(17), one O(18), one O(5), one O(6), one O(9), two equivalent O(14), two equivalent O(2), and two equivalent O(22) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(5)O12 cuboctahedra, corners with three equivalent Sr(8)O12 cuboctahedra, corners with six equivalent Sr(6)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra,  a faceface with one Nb(1)O6 octahedra,  a faceface with one Co(4)O6 octahedra, faces with three equivalent Nb(2)O6 octahedra, and faces with three equivalent Co(2)O6 octahedra. The Sr(6)-O(10) bond length is 2.88 Å. The Sr(6)-O(17) bond length is 2.87 Å. The Sr(6)-O(18) bond length is 2.92 Å. The Sr(6)-O(5) bond length is 2.64 Å. The Sr(6)-O(6) bond length is 2.71 Å. The Sr(6)-O(9) bond length is 2.92 Å. There is one shorter (2.74 Å) and one longer (2.91 Å) Sr(6)-O(14) bond length. There is one shorter (2.78 Å) and one longer (2.84 Å) Sr(6)-O(2) bond length. There is one shorter (2.75 Å) and one longer (2.91 Å) Sr(6)-O(22) bond length. In the seventh Sr site, Sr(7) is bonded to one O(11), one O(12), one O(19), one O(20), one O(7), one O(8), two equivalent O(15), two equivalent O(23), and two equivalent O(3) atoms to form distorted SrO12 cuboctahedra that share corners with three equivalent Sr(5)O12 cuboctahedra, corners with three equivalent Sr(8)O12 cuboctahedra, corners with six equivalent Sr(7)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra,  a faceface with one Nb(4)O6 octahedra,  a faceface with one Co(1)O6 octahedra, faces with three equivalent Nb(3)O6 octahedra, and faces with three equivalent Co(3)O6 octahedra. The Sr(7)-O(11) bond length is 2.80 Å. The Sr(7)-O(12) bond length is 2.71 Å. The Sr(7)-O(19) bond length is 2.77 Å. The Sr(7)-O(20) bond length is 3.08 Å. The Sr(7)-O(7) bond length is 2.79 Å. The Sr(7)-O(8) bond length is 2.78 Å. There is one shorter (2.72 Å) and one longer (2.92 Å) Sr(7)-O(15) bond length. There is one shorter (2.80 Å) and one longer (2.87 Å) Sr(7)-O(23) bond length. There is one shorter (2.71 Å) and one longer (2.91 Å) Sr(7)-O(3) bond length. In the eighth Sr site, Sr(8) is bonded to one O(10), one O(12), one O(18), one O(20), one O(6), one O(8), two equivalent O(16), two equivalent O(24), and two equivalent O(4) atoms to form SrO12 cuboctahedra that share corners with three equivalent Sr(6)O12 cuboctahedra, corners with three equivalent Sr(7)O12 cuboctahedra, corners with six equivalent Sr(8)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra,  a faceface with one Nb(2)O6 octahedra,  a faceface with one Co(3)O6 octahedra, faces with three equivalent Nb(4)O6 octahedra, and faces with three equivalent Co(4)O6 octahedra. The Sr(8)-O(10) bond length is 2.78 Å. The Sr(8)-O(12) bond length is 2.96 Å. The Sr(8)-O(18) bond length is 2.74 Å. The Sr(8)-O(20) bond length is 2.67 Å. The Sr(8)-O(6) bond length is 2.95 Å. The Sr(8)-O(8) bond length is 2.93 Å. There is one shorter (2.74 Å) and one longer (2.90 Å) Sr(8)-O(16) bond length. There is one shorter (2.74 Å) and one longer (2.92 Å) Sr(8)-O(24) bond length. There is one shorter (2.79 Å) and one longer (2.83 Å) Sr(8)-O(4) bond length. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(13), one O(17), one O(21), one O(5), and one O(9) atom to form NbO6 octahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra,  a faceface with one Sr(3)O12 cuboctahedra,  a faceface with one Sr(6)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with three equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-8°. The Nb(1)-O(1) bond length is 2.04 Å. The Nb(1)-O(13) bond length is 2.00 Å. The Nb(1)-O(17) bond length is 2.03 Å. The Nb(1)-O(21) bond length is 1.99 Å. The Nb(1)-O(5) bond length is 1.96 Å. The Nb(1)-O(9) bond length is 2.03 Å. In the second Nb site, Nb(2) is bonded to one O(10), one O(14), one O(18), one O(2), one O(22), and one O(6) atom to form NbO6 octahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(4)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(8)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, and faces with three equivalent Sr(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-7°. The Nb(2)-O(10) bond length is 1.96 Å. The Nb(2)-O(14) bond length is 2.04 Å. The Nb(2)-O(18) bond length is 1.96 Å. The Nb(2)-O(2) bond length is 1.94 Å. The Nb(2)-O(22) bond length is 2.03 Å. The Nb(2)-O(6) bond length is 2.09 Å. In the third Nb site, Nb(3) is bonded to one O(11), one O(15), one O(19), one O(23), one O(3), and one O(7) atom to form NbO6 octahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(3)O6 octahedra,  a faceface with one Sr(4)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, and faces with three equivalent Sr(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Nb(3)-O(11) bond length is 2.03 Å. The Nb(3)-O(15) bond length is 1.98 Å. The Nb(3)-O(19) bond length is 1.99 Å. The Nb(3)-O(23) bond length is 2.05 Å. The Nb(3)-O(3) bond length is 1.98 Å. The Nb(3)-O(7) bond length is 2.02 Å. In the fourth Nb site, Nb(4) is bonded to one O(12), one O(16), one O(20), one O(24), one O(4), and one O(8) atom to form NbO6 octahedra that share corners with three equivalent Co(3)O6 octahedra, corners with three equivalent Co(4)O6 octahedra,  a faceface with one Sr(2)O12 cuboctahedra,  a faceface with one Sr(7)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra, and faces with three equivalent Sr(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-11°. The Nb(4)-O(12) bond length is 1.99 Å. The Nb(4)-O(16) bond length is 1.98 Å. The Nb(4)-O(20) bond length is 2.08 Å. The Nb(4)-O(24) bond length is 1.95 Å. The Nb(4)-O(4) bond length is 2.09 Å. The Nb(4)-O(8) bond length is 1.96 Å. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(11), one O(13), one O(19), one O(21), and one O(7) atom to form CoO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra, corners with three equivalent Nb(3)O6 octahedra,  a faceface with one Sr(1)O12 cuboctahedra,  a faceface with one Sr(7)O12 cuboctahedra, faces with three equivalent Sr(3)O12 cuboctahedra, and faces with three equivalent Sr(5)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. The Co(1)-O(1) bond length is 1.94 Å. The Co(1)-O(11) bond length is 1.93 Å. The Co(1)-O(13) bond length is 1.97 Å. The Co(1)-O(19) bond length is 1.94 Å. The Co(1)-O(21) bond length is 1.94 Å. The Co(1)-O(7) bond length is 1.95 Å. In the second Co site, Co(2) is bonded to one O(14), one O(17), one O(2), one O(22), one O(5), and one O(9) atom to form CoO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra, corners with three equivalent Nb(2)O6 octahedra,  a faceface with one Sr(2)O12 cuboctahedra,  a faceface with one Sr(5)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with three equivalent Sr(6)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-8°. The Co(2)-O(14) bond length is 1.91 Å. The Co(2)-O(17) bond length is 1.93 Å. The Co(2)-O(2) bond length is 2.12 Å. The Co(2)-O(22) bond length is 1.91 Å. The Co(2)-O(5) bond length is 2.12 Å. The Co(2)-O(9) bond length is 1.92 Å. In the third Co site, Co(3) is bonded to one O(12), one O(15), one O(20), one O(23), one O(3), and one O(8) atom to form CoO6 octahedra that share corners with three equivalent Nb(3)O6 octahedra, corners with three equivalent Nb(4)O6 octahedra,  a faceface with one Sr(3)O12 cuboctahedra,  a faceface with one Sr(8)O12 cuboctahedra, faces with three equivalent Sr(4)O12 cuboctahedra, and faces with three equivalent Sr(7)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-11°. The Co(3)-O(12) bond length is 2.05 Å. The Co(3)-O(15) bond length is 2.08 Å. The Co(3)-O(20) bond length is 1.88 Å. The Co(3)-O(23) bond length is 1.91 Å. The Co(3)-O(3) bond length is 2.05 Å. The Co(3)-O(8) bond length is 2.08 Å. In the fourth Co site, Co(4) is bonded to one O(10), one O(16), one O(18), one O(24), one O(4), and one O(6) atom to form CoO6 octahedra that share corners with three equivalent Nb(2)O6 octahedra, corners with three equivalent Nb(4)O6 octahedra,  a faceface with one Sr(4)O12 cuboctahedra,  a faceface with one Sr(6)O12 cuboctahedra, faces with three equivalent Sr(2)O12 cuboctahedra, and faces with three equivalent Sr(8)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-7°. The Co(4)-O(10) bond length is 2.07 Å. The Co(4)-O(16) bond length is 2.02 Å. The Co(4)-O(18) bond length is 2.04 Å. The Co(4)-O(24) bond length is 2.06 Å. The Co(4)-O(4) bond length is 1.92 Å. The Co(4)-O(6) bond length is 1.91 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom to form a mixture of distorted corner and face-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the third O site, O(3) is bonded to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom to form distorted corner-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the tenth O site, O(10) is bonded to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom to form distorted corner-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles are 3°. In the eleventh O site, O(11) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom to form a mixture of distorted corner and face-sharing OSr4NbCo octahedra. The corner-sharing octahedral tilt angles range from 2-61°. In the fourteenth O site, O(14) is bonded in a distorted linear geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom. In the sixteenth O site, O(16) is bonded in a distorted linear geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom. In the seventeenth O site, O(17) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), two equivalent Sr(1), one Nb(1), and one Co(2) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Sr(6), one Sr(8), two equivalent Sr(2), one Nb(2), and one Co(4) atom. In the nineteenth O site, O(19) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), two equivalent Sr(3), one Nb(3), and one Co(1) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Sr(7), one Sr(8), two equivalent Sr(4), one Nb(4), and one Co(3) atom. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to one Sr(1), one Sr(3), two equivalent Sr(5), one Nb(1), and one Co(1) atom. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Sr(1), one Sr(2), two equivalent Sr(6), one Nb(2), and one Co(2) atom. In the twenty-third O site, O(23) is bonded in a 2-coordinate geometry to one Sr(3), one Sr(4), two equivalent Sr(7), one Nb(3), and one Co(3) atom. In the twenty-fourth O site, O(24) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(4), two equivalent Sr(8), one Nb(4), and one Co(4) atom.