Sr3TaCoO7 is (La,Ba)CuO4-derived structured and crystallizes in the triclinic P1 space group. There are twelve inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(13), one O(14), two equivalent O(11), two equivalent O(12), and two equivalent O(17) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(14), one O(16), two equivalent O(11), two equivalent O(18), and two equivalent O(9) atoms. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(13), one O(15), two equivalent O(10), two equivalent O(12), and two equivalent O(19) atoms. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(15), one O(16), two equivalent O(10), two equivalent O(20), and two equivalent O(9) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(1), one O(21), one O(23), two equivalent O(25), two equivalent O(5), and two equivalent O(7) atoms. In the sixth Sr site, Sr(6) is bonded in a 9-coordinate geometry to one O(2), one O(21), one O(22), two equivalent O(26), two equivalent O(5), and two equivalent O(6) atoms. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(23), one O(24), one O(3), two equivalent O(27), two equivalent O(7), and two equivalent O(8) atoms. In the eighth Sr site, Sr(8) is bonded in a 9-coordinate geometry to one O(22), one O(24), one O(4), two equivalent O(28), two equivalent O(6), and two equivalent O(8) atoms. In the ninth Sr site, Sr(9) is bonded in a 9-coordinate geometry to one O(13), one O(14), one O(5), two equivalent O(1), two equivalent O(17), and two equivalent O(2) atoms. In the tenth Sr site, Sr(10) is bonded in a 9-coordinate geometry to one O(14), one O(16), one O(6), two equivalent O(18), two equivalent O(2), and two equivalent O(4) atoms. In the eleventh Sr site, Sr(11) is bonded in a 9-coordinate geometry to one O(13), one O(15), one O(7), two equivalent O(1), two equivalent O(19), and two equivalent O(3) atoms. In the twelfth Sr site, Sr(12) is bonded in a 9-coordinate geometry to one O(15), one O(16), one O(8), two equivalent O(20), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(25), one O(26), one O(5), one O(9), and two equivalent O(21) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one Ta(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and corners with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. In the second Ta site, Ta(2) is bonded to one O(10), one O(26), one O(28), one O(6), and two equivalent O(22) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the third Ta site, Ta(3) is bonded to one O(11), one O(25), one O(27), one O(7), and two equivalent O(23) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 7°. In the fourth Ta site, Ta(4) is bonded to one O(12), one O(27), one O(28), one O(8), and two equivalent O(24) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one Ta(3)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, and corners with two equivalent Ta(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(12), one O(17), one O(19), and two equivalent O(13) atoms to form distorted CoO6 octahedra that share  a cornercorner with one Ta(4)O6 octahedra and corners with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-14°. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(11), one O(17), one O(18), one O(2), and two equivalent O(14) atoms. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to one O(10), one O(19), one O(20), one O(3), and two equivalent O(15) atoms. In the fourth Co site, Co(4) is bonded to one O(18), one O(20), one O(4), one O(9), and two equivalent O(16) atoms to form CoO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra and corners with two equivalent Co(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-8°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(5), two equivalent Sr(11), two equivalent Sr(9), and one Co(1) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(19)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(7)Sr5Ta octahedra,  a faceface with one O(17)Sr4Co2 octahedra,  a faceface with one O(19)Sr4Co2 octahedra, and faces with two equivalent O(13)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-55°. In the second O site, O(2) is bonded to one Sr(6), two equivalent Sr(10), two equivalent Sr(9), and one Co(2) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(6)Sr5Ta octahedra,  a faceface with one O(17)Sr4Co2 octahedra,  a faceface with one O(18)Sr4Co2 octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-57°. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(7), two equivalent Sr(11), two equivalent Sr(12), and one Co(3) atom. In the fourth O site, O(4) is bonded to one Sr(8), two equivalent Sr(10), two equivalent Sr(12), and one Co(4) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(20)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(6)Sr5Ta octahedra, edges with two equivalent O(8)Sr5Ta octahedra,  a faceface with one O(18)Sr4Co2 octahedra,  a faceface with one O(20)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fifth O site, O(5) is bonded to one Sr(9), two equivalent Sr(5), two equivalent Sr(6), and one Ta(1) atom to form OSr5Ta octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Ta octahedra, corners with two equivalent O(7)Sr5Ta octahedra,  an edgeedge with one O(6)Sr5Ta octahedra,  an edgeedge with one O(7)Sr5Ta octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, and edges with two equivalent O(5)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-47°. In the sixth O site, O(6) is bonded to one Sr(10), two equivalent Sr(6), two equivalent Sr(8), and one Ta(2) atom to form distorted OSr5Ta octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Ta octahedra, corners with two equivalent O(8)Sr5Ta octahedra,  an edgeedge with one O(5)Sr5Ta octahedra,  an edgeedge with one O(8)Sr5Ta octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, and edges with two equivalent O(6)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the seventh O site, O(7) is bonded to one Sr(11), two equivalent Sr(5), two equivalent Sr(7), and one Ta(3) atom to form OSr5Ta octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra, corners with two equivalent O(19)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Ta octahedra, corners with two equivalent O(8)Sr5Ta octahedra,  an edgeedge with one O(5)Sr5Ta octahedra,  an edgeedge with one O(8)Sr5Ta octahedra, edges with two equivalent O(1)Sr5Co octahedra, and edges with two equivalent O(7)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-47°. In the eighth O site, O(8) is bonded to one Sr(12), two equivalent Sr(7), two equivalent Sr(8), and one Ta(4) atom to form OSr5Ta octahedra that share  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra, corners with two equivalent O(20)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Ta octahedra, corners with two equivalent O(7)Sr5Ta octahedra,  an edgeedge with one O(6)Sr5Ta octahedra,  an edgeedge with one O(7)Sr5Ta octahedra, edges with two equivalent O(4)Sr5Co octahedra, and edges with two equivalent O(8)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Ta(1), and one Co(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to two equivalent Sr(3), two equivalent Sr(4), one Ta(2), and one Co(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to two equivalent Sr(1), two equivalent Sr(2), one Ta(3), and one Co(2) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to two equivalent Sr(1), two equivalent Sr(3), one Ta(4), and one Co(1) atom. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(11), one Sr(3), one Sr(9), and two equivalent Co(1) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(5)Sr5Ta octahedra,  a cornercorner with one O(7)Sr5Ta octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra, faces with two equivalent O(17)Sr4Co2 octahedra, faces with two equivalent O(19)Sr4Co2 octahedra, and faces with two equivalent O(1)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fourteenth O site, O(14) is bonded to one Sr(1), one Sr(10), one Sr(2), one Sr(9), and two equivalent Co(2) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(5)Sr5Ta octahedra,  a cornercorner with one O(6)Sr5Ta octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra, faces with two equivalent O(17)Sr4Co2 octahedra, faces with two equivalent O(18)Sr4Co2 octahedra, and faces with two equivalent O(2)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fifteenth O site, O(15) is bonded to one Sr(11), one Sr(12), one Sr(3), one Sr(4), and two equivalent Co(3) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(7)Sr5Ta octahedra,  a cornercorner with one O(8)Sr5Ta octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra, faces with two equivalent O(19)Sr4Co2 octahedra, and faces with two equivalent O(20)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 15-54°. In the sixteenth O site, O(16) is bonded to one Sr(10), one Sr(12), one Sr(2), one Sr(4), and two equivalent Co(4) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(6)Sr5Ta octahedra,  a cornercorner with one O(8)Sr5Ta octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra, faces with two equivalent O(18)Sr4Co2 octahedra, faces with two equivalent O(20)Sr4Co2 octahedra, and faces with two equivalent O(4)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 8-54°. In the seventeenth O site, O(17) is bonded to two equivalent Sr(1), two equivalent Sr(9), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(18)Sr4Co2 octahedra,  a cornercorner with one O(19)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(17)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra, faces with two equivalent O(13)Sr4Co2 octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-53°. In the eighteenth O site, O(18) is bonded to two equivalent Sr(10), two equivalent Sr(2), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(17)Sr4Co2 octahedra,  a cornercorner with one O(20)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Ta octahedra, edges with two equivalent O(18)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra, faces with two equivalent O(14)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 9-57°. In the nineteenth O site, O(19) is bonded to two equivalent Sr(11), two equivalent Sr(3), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(17)Sr4Co2 octahedra,  a cornercorner with one O(20)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(7)Sr5Ta octahedra, edges with two equivalent O(19)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra, faces with two equivalent O(13)Sr4Co2 octahedra, and faces with two equivalent O(15)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-55°. In the twentieth O site, O(20) is bonded to two equivalent Sr(12), two equivalent Sr(4), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(18)Sr4Co2 octahedra,  a cornercorner with one O(19)Sr4Co2 octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(8)Sr5Ta octahedra, edges with two equivalent O(20)Sr4Co2 octahedra,  a faceface with one O(4)Sr5Co octahedra, faces with two equivalent O(15)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 9-50°. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), and two equivalent Ta(1) atoms. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Sr(6), one Sr(8), and two equivalent Ta(2) atoms. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), and two equivalent Ta(3) atoms. In the twenty-fourth O site, O(24) is bonded in a distorted linear geometry to one Sr(7), one Sr(8), and two equivalent Ta(4) atoms. In the twenty-fifth O site, O(25) is bonded in a distorted linear geometry to two equivalent Sr(5), one Ta(1), and one Ta(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted linear geometry to two equivalent Sr(6), one Ta(1), and one Ta(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to two equivalent Sr(7), one Ta(3), and one Ta(4) atom. In the twenty-eighth O site, O(28) is bonded in a distorted linear geometry to two equivalent Sr(8), one Ta(2), and one Ta(4) atom.
Sr3TaCoO7 is (La,Ba)CuO4-derived structured and crystallizes in the triclinic P1 space group. There are twelve inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(13), one O(14), two equivalent O(11), two equivalent O(12), and two equivalent O(17) atoms. The Sr(1)-O(13) bond length is 2.56 Å. The Sr(1)-O(14) bond length is 2.56 Å. Both Sr(1)-O(11) bond lengths are 2.86 Å. Both Sr(1)-O(12) bond lengths are 2.88 Å. Both Sr(1)-O(17) bond lengths are 2.59 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(14), one O(16), two equivalent O(11), two equivalent O(18), and two equivalent O(9) atoms. The Sr(2)-O(14) bond length is 2.62 Å. The Sr(2)-O(16) bond length is 2.60 Å. Both Sr(2)-O(11) bond lengths are 2.86 Å. Both Sr(2)-O(18) bond lengths are 2.58 Å. Both Sr(2)-O(9) bond lengths are 2.86 Å. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(13), one O(15), two equivalent O(10), two equivalent O(12), and two equivalent O(19) atoms. The Sr(3)-O(13) bond length is 2.60 Å. The Sr(3)-O(15) bond length is 2.55 Å. Both Sr(3)-O(10) bond lengths are 2.84 Å. There is one shorter (2.84 Å) and one longer (2.85 Å) Sr(3)-O(12) bond length. Both Sr(3)-O(19) bond lengths are 2.60 Å. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(15), one O(16), two equivalent O(10), two equivalent O(20), and two equivalent O(9) atoms. The Sr(4)-O(15) bond length is 2.59 Å. The Sr(4)-O(16) bond length is 2.61 Å. There is one shorter (2.86 Å) and one longer (2.88 Å) Sr(4)-O(10) bond length. There is one shorter (2.57 Å) and one longer (2.58 Å) Sr(4)-O(20) bond length. There is one shorter (2.89 Å) and one longer (2.92 Å) Sr(4)-O(9) bond length. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one O(1), one O(21), one O(23), two equivalent O(25), two equivalent O(5), and two equivalent O(7) atoms. The Sr(5)-O(1) bond length is 2.37 Å. The Sr(5)-O(21) bond length is 2.75 Å. The Sr(5)-O(23) bond length is 2.73 Å. Both Sr(5)-O(25) bond lengths are 2.75 Å. Both Sr(5)-O(5) bond lengths are 2.79 Å. Both Sr(5)-O(7) bond lengths are 2.79 Å. In the sixth Sr site, Sr(6) is bonded in a 9-coordinate geometry to one O(2), one O(21), one O(22), two equivalent O(26), two equivalent O(5), and two equivalent O(6) atoms. The Sr(6)-O(2) bond length is 2.37 Å. The Sr(6)-O(21) bond length is 2.75 Å. The Sr(6)-O(22) bond length is 2.73 Å. Both Sr(6)-O(26) bond lengths are 2.77 Å. Both Sr(6)-O(5) bond lengths are 2.79 Å. Both Sr(6)-O(6) bond lengths are 2.78 Å. In the seventh Sr site, Sr(7) is bonded in a 9-coordinate geometry to one O(23), one O(24), one O(3), two equivalent O(27), two equivalent O(7), and two equivalent O(8) atoms. The Sr(7)-O(23) bond length is 2.75 Å. The Sr(7)-O(24) bond length is 2.74 Å. The Sr(7)-O(3) bond length is 2.36 Å. Both Sr(7)-O(27) bond lengths are 2.74 Å. Both Sr(7)-O(7) bond lengths are 2.80 Å. Both Sr(7)-O(8) bond lengths are 2.79 Å. In the eighth Sr site, Sr(8) is bonded in a 9-coordinate geometry to one O(22), one O(24), one O(4), two equivalent O(28), two equivalent O(6), and two equivalent O(8) atoms. The Sr(8)-O(22) bond length is 2.76 Å. The Sr(8)-O(24) bond length is 2.75 Å. The Sr(8)-O(4) bond length is 2.36 Å. Both Sr(8)-O(28) bond lengths are 2.73 Å. Both Sr(8)-O(6) bond lengths are 2.82 Å. There is one shorter (2.79 Å) and one longer (2.80 Å) Sr(8)-O(8) bond length. In the ninth Sr site, Sr(9) is bonded in a 9-coordinate geometry to one O(13), one O(14), one O(5), two equivalent O(1), two equivalent O(17), and two equivalent O(2) atoms. The Sr(9)-O(13) bond length is 2.69 Å. The Sr(9)-O(14) bond length is 2.66 Å. The Sr(9)-O(5) bond length is 2.66 Å. Both Sr(9)-O(1) bond lengths are 2.80 Å. Both Sr(9)-O(17) bond lengths are 2.71 Å. Both Sr(9)-O(2) bond lengths are 2.78 Å. In the tenth Sr site, Sr(10) is bonded in a 9-coordinate geometry to one O(14), one O(16), one O(6), two equivalent O(18), two equivalent O(2), and two equivalent O(4) atoms. The Sr(10)-O(14) bond length is 2.75 Å. The Sr(10)-O(16) bond length is 2.68 Å. The Sr(10)-O(6) bond length is 2.63 Å. There is one shorter (2.72 Å) and one longer (2.75 Å) Sr(10)-O(18) bond length. There is one shorter (2.87 Å) and one longer (2.90 Å) Sr(10)-O(2) bond length. There is one shorter (2.76 Å) and one longer (2.79 Å) Sr(10)-O(4) bond length. In the eleventh Sr site, Sr(11) is bonded in a 9-coordinate geometry to one O(13), one O(15), one O(7), two equivalent O(1), two equivalent O(19), and two equivalent O(3) atoms. The Sr(11)-O(13) bond length is 2.71 Å. The Sr(11)-O(15) bond length is 2.67 Å. The Sr(11)-O(7) bond length is 2.61 Å. Both Sr(11)-O(1) bond lengths are 2.82 Å. Both Sr(11)-O(19) bond lengths are 2.73 Å. Both Sr(11)-O(3) bond lengths are 2.75 Å. In the twelfth Sr site, Sr(12) is bonded in a 9-coordinate geometry to one O(15), one O(16), one O(8), two equivalent O(20), two equivalent O(3), and two equivalent O(4) atoms. The Sr(12)-O(15) bond length is 2.77 Å. The Sr(12)-O(16) bond length is 2.64 Å. The Sr(12)-O(8) bond length is 2.64 Å. There is one shorter (2.71 Å) and one longer (2.73 Å) Sr(12)-O(20) bond length. There is one shorter (2.92 Å) and one longer (2.93 Å) Sr(12)-O(3) bond length. Both Sr(12)-O(4) bond lengths are 2.78 Å. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(25), one O(26), one O(5), one O(9), and two equivalent O(21) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one Ta(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and corners with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. The Ta(1)-O(25) bond length is 1.97 Å. The Ta(1)-O(26) bond length is 1.97 Å. The Ta(1)-O(5) bond length is 2.09 Å. The Ta(1)-O(9) bond length is 1.92 Å. Both Ta(1)-O(21) bond lengths are 1.99 Å. In the second Ta site, Ta(2) is bonded to one O(10), one O(26), one O(28), one O(6), and two equivalent O(22) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. The Ta(2)-O(10) bond length is 1.91 Å. The Ta(2)-O(26) bond length is 1.98 Å. The Ta(2)-O(28) bond length is 1.97 Å. The Ta(2)-O(6) bond length is 2.09 Å. Both Ta(2)-O(22) bond lengths are 1.99 Å. In the third Ta site, Ta(3) is bonded to one O(11), one O(25), one O(27), one O(7), and two equivalent O(23) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 7°. The Ta(3)-O(11) bond length is 1.91 Å. The Ta(3)-O(25) bond length is 1.97 Å. The Ta(3)-O(27) bond length is 1.97 Å. The Ta(3)-O(7) bond length is 2.09 Å. Both Ta(3)-O(23) bond lengths are 1.99 Å. In the fourth Ta site, Ta(4) is bonded to one O(12), one O(27), one O(28), one O(8), and two equivalent O(24) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one Ta(3)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, and corners with two equivalent Ta(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-9°. The Ta(4)-O(12) bond length is 1.91 Å. The Ta(4)-O(27) bond length is 1.97 Å. The Ta(4)-O(28) bond length is 1.97 Å. The Ta(4)-O(8) bond length is 2.10 Å. Both Ta(4)-O(24) bond lengths are 1.99 Å. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(12), one O(17), one O(19), and two equivalent O(13) atoms to form distorted CoO6 octahedra that share  a cornercorner with one Ta(4)O6 octahedra and corners with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-14°. The Co(1)-O(1) bond length is 1.96 Å. The Co(1)-O(12) bond length is 2.56 Å. The Co(1)-O(17) bond length is 1.98 Å. The Co(1)-O(19) bond length is 1.91 Å. Both Co(1)-O(13) bond lengths are 2.00 Å. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(11), one O(17), one O(18), one O(2), and two equivalent O(14) atoms. The Co(2)-O(11) bond length is 2.56 Å. The Co(2)-O(17) bond length is 2.03 Å. The Co(2)-O(18) bond length is 1.88 Å. The Co(2)-O(2) bond length is 1.94 Å. Both Co(2)-O(14) bond lengths are 2.00 Å. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to one O(10), one O(19), one O(20), one O(3), and two equivalent O(15) atoms. The Co(3)-O(10) bond length is 2.57 Å. The Co(3)-O(19) bond length is 2.04 Å. The Co(3)-O(20) bond length is 1.88 Å. The Co(3)-O(3) bond length is 1.94 Å. Both Co(3)-O(15) bond lengths are 2.00 Å. In the fourth Co site, Co(4) is bonded to one O(18), one O(20), one O(4), one O(9), and two equivalent O(16) atoms to form CoO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra and corners with two equivalent Co(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-8°. The Co(4)-O(18) bond length is 2.06 Å. The Co(4)-O(20) bond length is 2.08 Å. The Co(4)-O(4) bond length is 2.05 Å. The Co(4)-O(9) bond length is 2.40 Å. There is one shorter (1.98 Å) and one longer (1.99 Å) Co(4)-O(16) bond length. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(5), two equivalent Sr(11), two equivalent Sr(9), and one Co(1) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(19)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(7)Sr5Ta octahedra,  a faceface with one O(17)Sr4Co2 octahedra,  a faceface with one O(19)Sr4Co2 octahedra, and faces with two equivalent O(13)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-55°. In the second O site, O(2) is bonded to one Sr(6), two equivalent Sr(10), two equivalent Sr(9), and one Co(2) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(1)Sr5Co octahedra,  an edgeedge with one O(4)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(6)Sr5Ta octahedra,  a faceface with one O(17)Sr4Co2 octahedra,  a faceface with one O(18)Sr4Co2 octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-57°. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Sr(7), two equivalent Sr(11), two equivalent Sr(12), and one Co(3) atom. In the fourth O site, O(4) is bonded to one Sr(8), two equivalent Sr(10), two equivalent Sr(12), and one Co(4) atom to form distorted OSr5Co octahedra that share corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(20)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, edges with two equivalent O(6)Sr5Ta octahedra, edges with two equivalent O(8)Sr5Ta octahedra,  a faceface with one O(18)Sr4Co2 octahedra,  a faceface with one O(20)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fifth O site, O(5) is bonded to one Sr(9), two equivalent Sr(5), two equivalent Sr(6), and one Ta(1) atom to form OSr5Ta octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(14)Sr4Co2 octahedra, corners with two equivalent O(17)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Ta octahedra, corners with two equivalent O(7)Sr5Ta octahedra,  an edgeedge with one O(6)Sr5Ta octahedra,  an edgeedge with one O(7)Sr5Ta octahedra, edges with two equivalent O(1)Sr5Co octahedra, edges with two equivalent O(2)Sr5Co octahedra, and edges with two equivalent O(5)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-47°. In the sixth O site, O(6) is bonded to one Sr(10), two equivalent Sr(6), two equivalent Sr(8), and one Ta(2) atom to form distorted OSr5Ta octahedra that share  a cornercorner with one O(14)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra, corners with two equivalent O(18)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Ta octahedra, corners with two equivalent O(8)Sr5Ta octahedra,  an edgeedge with one O(5)Sr5Ta octahedra,  an edgeedge with one O(8)Sr5Ta octahedra, edges with two equivalent O(2)Sr5Co octahedra, edges with two equivalent O(4)Sr5Co octahedra, and edges with two equivalent O(6)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the seventh O site, O(7) is bonded to one Sr(11), two equivalent Sr(5), two equivalent Sr(7), and one Ta(3) atom to form OSr5Ta octahedra that share  a cornercorner with one O(13)Sr4Co2 octahedra,  a cornercorner with one O(15)Sr4Co2 octahedra, corners with two equivalent O(19)Sr4Co2 octahedra, corners with two equivalent O(5)Sr5Ta octahedra, corners with two equivalent O(8)Sr5Ta octahedra,  an edgeedge with one O(5)Sr5Ta octahedra,  an edgeedge with one O(8)Sr5Ta octahedra, edges with two equivalent O(1)Sr5Co octahedra, and edges with two equivalent O(7)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-47°. In the eighth O site, O(8) is bonded to one Sr(12), two equivalent Sr(7), two equivalent Sr(8), and one Ta(4) atom to form OSr5Ta octahedra that share  a cornercorner with one O(15)Sr4Co2 octahedra,  a cornercorner with one O(16)Sr4Co2 octahedra, corners with two equivalent O(20)Sr4Co2 octahedra, corners with two equivalent O(6)Sr5Ta octahedra, corners with two equivalent O(7)Sr5Ta octahedra,  an edgeedge with one O(6)Sr5Ta octahedra,  an edgeedge with one O(7)Sr5Ta octahedra, edges with two equivalent O(4)Sr5Co octahedra, and edges with two equivalent O(8)Sr5Ta octahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent Sr(4), one Ta(1), and one Co(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to two equivalent Sr(3), two equivalent Sr(4), one Ta(2), and one Co(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to two equivalent Sr(1), two equivalent Sr(2), one Ta(3), and one Co(2) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to two equivalent Sr(1), two equivalent Sr(3), one Ta(4), and one Co(1) atom. In the thirteenth O site, O(13) is bonded to one Sr(1), one Sr(11), one Sr(3), one Sr(9), and two equivalent Co(1) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(5)Sr5Ta octahedra,  a cornercorner with one O(7)Sr5Ta octahedra, corners with two equivalent O(13)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra, faces with two equivalent O(17)Sr4Co2 octahedra, faces with two equivalent O(19)Sr4Co2 octahedra, and faces with two equivalent O(1)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fourteenth O site, O(14) is bonded to one Sr(1), one Sr(10), one Sr(2), one Sr(9), and two equivalent Co(2) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(5)Sr5Ta octahedra,  a cornercorner with one O(6)Sr5Ta octahedra, corners with two equivalent O(14)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra, faces with two equivalent O(17)Sr4Co2 octahedra, faces with two equivalent O(18)Sr4Co2 octahedra, and faces with two equivalent O(2)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 14-54°. In the fifteenth O site, O(15) is bonded to one Sr(11), one Sr(12), one Sr(3), one Sr(4), and two equivalent Co(3) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(7)Sr5Ta octahedra,  a cornercorner with one O(8)Sr5Ta octahedra, corners with two equivalent O(15)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra,  an edgeedge with one O(13)Sr4Co2 octahedra,  an edgeedge with one O(16)Sr4Co2 octahedra, faces with two equivalent O(19)Sr4Co2 octahedra, and faces with two equivalent O(20)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 15-54°. In the sixteenth O site, O(16) is bonded to one Sr(10), one Sr(12), one Sr(2), one Sr(4), and two equivalent Co(4) atoms to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(6)Sr5Ta octahedra,  a cornercorner with one O(8)Sr5Ta octahedra, corners with two equivalent O(16)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra,  an edgeedge with one O(14)Sr4Co2 octahedra,  an edgeedge with one O(15)Sr4Co2 octahedra, faces with two equivalent O(18)Sr4Co2 octahedra, faces with two equivalent O(20)Sr4Co2 octahedra, and faces with two equivalent O(4)Sr5Co octahedra. The corner-sharing octahedral tilt angles range from 8-54°. In the seventeenth O site, O(17) is bonded to two equivalent Sr(1), two equivalent Sr(9), one Co(1), and one Co(2) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(18)Sr4Co2 octahedra,  a cornercorner with one O(19)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(5)Sr5Ta octahedra, edges with two equivalent O(17)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra,  a faceface with one O(2)Sr5Co octahedra, faces with two equivalent O(13)Sr4Co2 octahedra, and faces with two equivalent O(14)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-53°. In the eighteenth O site, O(18) is bonded to two equivalent Sr(10), two equivalent Sr(2), one Co(2), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(17)Sr4Co2 octahedra,  a cornercorner with one O(20)Sr4Co2 octahedra, corners with two equivalent O(2)Sr5Co octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(6)Sr5Ta octahedra, edges with two equivalent O(18)Sr4Co2 octahedra,  a faceface with one O(2)Sr5Co octahedra,  a faceface with one O(4)Sr5Co octahedra, faces with two equivalent O(14)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 9-57°. In the nineteenth O site, O(19) is bonded to two equivalent Sr(11), two equivalent Sr(3), one Co(1), and one Co(3) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(17)Sr4Co2 octahedra,  a cornercorner with one O(20)Sr4Co2 octahedra, corners with two equivalent O(1)Sr5Co octahedra, corners with two equivalent O(7)Sr5Ta octahedra, edges with two equivalent O(19)Sr4Co2 octahedra,  a faceface with one O(1)Sr5Co octahedra, faces with two equivalent O(13)Sr4Co2 octahedra, and faces with two equivalent O(15)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 14-55°. In the twentieth O site, O(20) is bonded to two equivalent Sr(12), two equivalent Sr(4), one Co(3), and one Co(4) atom to form distorted OSr4Co2 octahedra that share  a cornercorner with one O(18)Sr4Co2 octahedra,  a cornercorner with one O(19)Sr4Co2 octahedra, corners with two equivalent O(4)Sr5Co octahedra, corners with two equivalent O(8)Sr5Ta octahedra, edges with two equivalent O(20)Sr4Co2 octahedra,  a faceface with one O(4)Sr5Co octahedra, faces with two equivalent O(15)Sr4Co2 octahedra, and faces with two equivalent O(16)Sr4Co2 octahedra. The corner-sharing octahedral tilt angles range from 9-50°. In the twenty-first O site, O(21) is bonded in a distorted linear geometry to one Sr(5), one Sr(6), and two equivalent Ta(1) atoms. In the twenty-second O site, O(22) is bonded in a distorted linear geometry to one Sr(6), one Sr(8), and two equivalent Ta(2) atoms. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one Sr(5), one Sr(7), and two equivalent Ta(3) atoms. In the twenty-fourth O site, O(24) is bonded in a distorted linear geometry to one Sr(7), one Sr(8), and two equivalent Ta(4) atoms. In the twenty-fifth O site, O(25) is bonded in a distorted linear geometry to two equivalent Sr(5), one Ta(1), and one Ta(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted linear geometry to two equivalent Sr(6), one Ta(1), and one Ta(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to two equivalent Sr(7), one Ta(3), and one Ta(4) atom. In the twenty-eighth O site, O(28) is bonded in a distorted linear geometry to two equivalent Sr(8), one Ta(2), and one Ta(4) atom.