YbBaCo4O7 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), one O(9), two equivalent O(1), two equivalent O(12), and two equivalent O(5) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra,  an edgeedge with one Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra,  an edgeedge with one Co(7)O4 tetrahedra, edges with two equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(5)O4 tetrahedra, edges with two equivalent Co(6)O4 tetrahedra, edges with three equivalent Co(8)O4 tetrahedra,  a faceface with one Yb(1)O6 octahedra, and faces with three equivalent Yb(2)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), one O(9), two equivalent O(10), two equivalent O(14), and two equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(5)O4 tetrahedra,  an edgeedge with one Co(6)O4 tetrahedra, edges with two equivalent Co(2)O4 tetrahedra, edges with two equivalent Co(3)O4 tetrahedra, edges with two equivalent Co(7)O4 tetrahedra, edges with three equivalent Co(4)O4 tetrahedra,  a faceface with one Yb(2)O6 octahedra, and faces with three equivalent Yb(1)O6 octahedra. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one O(10), one O(14), one O(2), one O(3), one O(6), and one O(8) atom to form YbO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with three equivalent Co(4)O4 tetrahedra,  a faceface with one Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(2)O12 cuboctahedra. In the second Yb site, Yb(2) is bonded to one O(1), one O(11), one O(12), one O(4), one O(5), and one O(9) atom to form YbO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, corners with three equivalent Co(8)O4 tetrahedra,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. There are eight inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the second Co site, Co(2) is bonded to one O(11), one O(13), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. In the third Co site, Co(3) is bonded to one O(11), one O(13), one O(14), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. In the fourth Co site, Co(4) is bonded to one O(10), one O(14), one O(3), and one O(7) atom to form CoO4 tetrahedra that share corners with three equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, and edges with three equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 56°. In the fifth Co site, Co(5) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the sixth Co site, Co(6) is bonded to one O(12), one O(2), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the seventh Co site, Co(7) is bonded to one O(10), one O(13), one O(4), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. In the eighth Co site, Co(8) is bonded to one O(1), one O(12), one O(13), and one O(5) atom to form CoO4 tetrahedra that share corners with three equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(5), and one Co(8) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(5), and one Co(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(2), and one Co(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(2), and one Co(7) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(1), and one Co(8) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(1), and one Co(6) atom. In the seventh O site, O(7) is bonded in a tetrahedral geometry to one Co(1), one Co(4), one Co(5), and one Co(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(1), and one Co(5) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(3), and one Co(7) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(4), and one Co(7) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(2), and one Co(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(6), and one Co(8) atom. In the thirteenth O site, O(13) is bonded in a tetrahedral geometry to one Co(2), one Co(3), one Co(7), and one Co(8) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(3), and one Co(4) atom.
YbBaCo4O7 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), one O(9), two equivalent O(1), two equivalent O(12), and two equivalent O(5) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra,  an edgeedge with one Co(2)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra,  an edgeedge with one Co(7)O4 tetrahedra, edges with two equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(5)O4 tetrahedra, edges with two equivalent Co(6)O4 tetrahedra, edges with three equivalent Co(8)O4 tetrahedra,  a faceface with one Yb(1)O6 octahedra, and faces with three equivalent Yb(2)O6 octahedra. The Ba(1)-O(11) bond length is 3.09 Å. The Ba(1)-O(2) bond length is 3.15 Å. The Ba(1)-O(4) bond length is 3.09 Å. The Ba(1)-O(6) bond length is 3.16 Å. The Ba(1)-O(8) bond length is 3.15 Å. The Ba(1)-O(9) bond length is 3.09 Å. There is one shorter (3.09 Å) and one longer (3.17 Å) Ba(1)-O(1) bond length. There is one shorter (3.09 Å) and one longer (3.18 Å) Ba(1)-O(12) bond length. There is one shorter (3.10 Å) and one longer (3.17 Å) Ba(1)-O(5) bond length. In the second Ba site, Ba(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), one O(9), two equivalent O(10), two equivalent O(14), and two equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(5)O4 tetrahedra,  an edgeedge with one Co(6)O4 tetrahedra, edges with two equivalent Co(2)O4 tetrahedra, edges with two equivalent Co(3)O4 tetrahedra, edges with two equivalent Co(7)O4 tetrahedra, edges with three equivalent Co(4)O4 tetrahedra,  a faceface with one Yb(2)O6 octahedra, and faces with three equivalent Yb(1)O6 octahedra. The Ba(2)-O(11) bond length is 3.09 Å. The Ba(2)-O(2) bond length is 3.22 Å. The Ba(2)-O(4) bond length is 3.09 Å. The Ba(2)-O(6) bond length is 3.21 Å. The Ba(2)-O(8) bond length is 3.22 Å. The Ba(2)-O(9) bond length is 3.09 Å. There is one shorter (3.08 Å) and one longer (3.18 Å) Ba(2)-O(10) bond length. There is one shorter (3.09 Å) and one longer (3.18 Å) Ba(2)-O(14) bond length. There is one shorter (3.08 Å) and one longer (3.18 Å) Ba(2)-O(3) bond length. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one O(10), one O(14), one O(2), one O(3), one O(6), and one O(8) atom to form YbO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with three equivalent Co(4)O4 tetrahedra,  a faceface with one Ba(1)O12 cuboctahedra, and faces with three equivalent Ba(2)O12 cuboctahedra. The Yb(1)-O(10) bond length is 2.26 Å. The Yb(1)-O(14) bond length is 2.26 Å. The Yb(1)-O(2) bond length is 2.35 Å. The Yb(1)-O(3) bond length is 2.26 Å. The Yb(1)-O(6) bond length is 2.35 Å. The Yb(1)-O(8) bond length is 2.35 Å. In the second Yb site, Yb(2) is bonded to one O(1), one O(11), one O(12), one O(4), one O(5), and one O(9) atom to form YbO6 octahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, corners with three equivalent Co(8)O4 tetrahedra,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. The Yb(2)-O(1) bond length is 2.33 Å. The Yb(2)-O(11) bond length is 2.26 Å. The Yb(2)-O(12) bond length is 2.33 Å. The Yb(2)-O(4) bond length is 2.26 Å. The Yb(2)-O(5) bond length is 2.34 Å. The Yb(2)-O(9) bond length is 2.26 Å. There are eight inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. The Co(1)-O(5) bond length is 1.84 Å. The Co(1)-O(6) bond length is 1.83 Å. The Co(1)-O(7) bond length is 1.90 Å. The Co(1)-O(8) bond length is 1.83 Å. In the second Co site, Co(2) is bonded to one O(11), one O(13), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. The Co(2)-O(11) bond length is 1.89 Å. The Co(2)-O(13) bond length is 1.99 Å. The Co(2)-O(3) bond length is 1.89 Å. The Co(2)-O(4) bond length is 1.89 Å. In the third Co site, Co(3) is bonded to one O(11), one O(13), one O(14), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. The Co(3)-O(11) bond length is 1.89 Å. The Co(3)-O(13) bond length is 1.99 Å. The Co(3)-O(14) bond length is 1.89 Å. The Co(3)-O(9) bond length is 1.89 Å. In the fourth Co site, Co(4) is bonded to one O(10), one O(14), one O(3), and one O(7) atom to form CoO4 tetrahedra that share corners with three equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, and edges with three equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 56°. The Co(4)-O(10) bond length is 1.89 Å. The Co(4)-O(14) bond length is 1.89 Å. The Co(4)-O(3) bond length is 1.89 Å. The Co(4)-O(7) bond length is 1.93 Å. In the fifth Co site, Co(5) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. The Co(5)-O(1) bond length is 1.84 Å. The Co(5)-O(2) bond length is 1.83 Å. The Co(5)-O(7) bond length is 1.89 Å. The Co(5)-O(8) bond length is 1.83 Å. In the sixth Co site, Co(6) is bonded to one O(12), one O(2), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(2)O6 octahedra, corners with two equivalent Yb(1)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra,  an edgeedge with one Ba(2)O12 cuboctahedra, and edges with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 58-60°. The Co(6)-O(12) bond length is 1.84 Å. The Co(6)-O(2) bond length is 1.83 Å. The Co(6)-O(6) bond length is 1.83 Å. The Co(6)-O(7) bond length is 1.89 Å. In the seventh Co site, Co(7) is bonded to one O(10), one O(13), one O(4), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Yb(1)O6 octahedra, corners with two equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra,  an edgeedge with one Ba(1)O12 cuboctahedra, and edges with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 52-59°. The Co(7)-O(10) bond length is 1.89 Å. The Co(7)-O(13) bond length is 1.99 Å. The Co(7)-O(4) bond length is 1.89 Å. The Co(7)-O(9) bond length is 1.89 Å. In the eighth Co site, Co(8) is bonded to one O(1), one O(12), one O(13), and one O(5) atom to form CoO4 tetrahedra that share corners with three equivalent Yb(2)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. The Co(8)-O(1) bond length is 1.86 Å. The Co(8)-O(12) bond length is 1.86 Å. The Co(8)-O(13) bond length is 1.89 Å. The Co(8)-O(5) bond length is 1.86 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(5), and one Co(8) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(5), and one Co(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(2), and one Co(4) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(2), and one Co(7) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(1), and one Co(8) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(1), and one Co(6) atom. In the seventh O site, O(7) is bonded in a tetrahedral geometry to one Co(1), one Co(4), one Co(5), and one Co(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), one Yb(1), one Co(1), and one Co(5) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(3), and one Co(7) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(4), and one Co(7) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Yb(2), one Co(2), and one Co(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1), one Yb(2), one Co(6), and one Co(8) atom. In the thirteenth O site, O(13) is bonded in a tetrahedral geometry to one Co(2), one Co(3), one Co(7), and one Co(8) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to two equivalent Ba(2), one Yb(1), one Co(3), and one Co(4) atom.