Y4Co13Si2(SbO14)2 is Aluminum carbonitride-derived structured and crystallizes in the monoclinic C2/m space group. Y(1) is bonded in a 5-coordinate geometry to one O(1), one O(5), and three equivalent O(2) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(7), one O(8), and two equivalent O(1) atoms to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra, and  an edgeedge with one Co(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-68°. In the second Co site, Co(2) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Co(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with three equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 53-73°. In the third Co site, Co(3) is bonded to two equivalent O(8) and four equivalent O(5) atoms to form distorted CoO6 octahedra that share corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(5)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. In the fourth Co site, Co(4) is bonded to two equivalent O(4) and four equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(5)O6 octahedra. In the fifth Co site, Co(5) is bonded to two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Si(1) is bonded to one O(3), one O(4), and two equivalent O(7) atoms to form SiO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with four equivalent Co(2)O4 tetrahedra, and corners with two equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 61-62°. Sb(1) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and edges with three equivalent Co(3)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Co(2), and two equivalent Co(1) atoms to form OYCo3 tetrahedra that share  a cornercorner with one O(6)Co3Sb tetrahedra,  a cornercorner with one O(5)YCo2Sb tetrahedra, corners with three equivalent O(2)Y3Co tetrahedra,  an edgeedge with one O(2)Y3Co tetrahedra, and  an edgeedge with one O(1)YCo3 tetrahedra. In the second O site, O(2) is bonded to three equivalent Y(1) and one Co(1) atom to form distorted OY3Co tetrahedra that share corners with two equivalent O(2)Y3Co tetrahedra, corners with three equivalent O(5)YCo2Sb tetrahedra, corners with three equivalent O(1)YCo3 tetrahedra,  an edgeedge with one O(1)YCo3 tetrahedra, and edges with two equivalent O(2)Y3Co tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one Si(1) atom. In the fourth O site, O(4) is bonded to one Co(4), two equivalent Co(5), and one Si(1) atom to form distorted OCo3Si tetrahedra that share  a cornercorner with one O(4)Co3Si tetrahedra, corners with four equivalent O(6)Co3Sb tetrahedra,  an edgeedge with one O(4)Co3Si tetrahedra, and edges with two equivalent O(6)Co3Sb tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), two equivalent Co(3), and one Sb(1) atom to form distorted OYCo2Sb tetrahedra that share  a cornercorner with one O(1)YCo3 tetrahedra, corners with two equivalent O(6)Co3Sb tetrahedra, corners with three equivalent O(2)Y3Co tetrahedra, corners with three equivalent O(5)YCo2Sb tetrahedra, and edges with two equivalent O(5)YCo2Sb tetrahedra. In the sixth O site, O(6) is bonded to one Co(2), one Co(4), one Co(5), and one Sb(1) atom to form distorted OCo3Sb tetrahedra that share  a cornercorner with one O(1)YCo3 tetrahedra, corners with two equivalent O(4)Co3Si tetrahedra, corners with two equivalent O(5)YCo2Sb tetrahedra, corners with three equivalent O(6)Co3Sb tetrahedra,  an edgeedge with one O(6)Co3Sb tetrahedra, and  an edgeedge with one O(4)Co3Si tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(5), and one Sb(1) atom.
Y4Co13Si2(SbO14)2 is Aluminum carbonitride-derived structured and crystallizes in the monoclinic C2/m space group. Y(1) is bonded in a 5-coordinate geometry to one O(1), one O(5), and three equivalent O(2) atoms. The Y(1)-O(1) bond length is 2.12 Å. The Y(1)-O(5) bond length is 2.20 Å. There are a spread of Y(1)-O(2) bond distances ranging from 2.15-2.53 Å. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(7), one O(8), and two equivalent O(1) atoms to form CoO5 trigonal bipyramids that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Co(2)O4 tetrahedra, and  an edgeedge with one Co(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-68°. The Co(1)-O(2) bond length is 2.03 Å. The Co(1)-O(7) bond length is 1.97 Å. The Co(1)-O(8) bond length is 2.41 Å. There is one shorter (2.01 Å) and one longer (2.10 Å) Co(1)-O(1) bond length. In the second Co site, Co(2) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Co(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with three equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 53-73°. The Co(2)-O(1) bond length is 1.93 Å. The Co(2)-O(3) bond length is 1.97 Å. The Co(2)-O(6) bond length is 1.97 Å. The Co(2)-O(7) bond length is 1.98 Å. In the third Co site, Co(3) is bonded to two equivalent O(8) and four equivalent O(5) atoms to form distorted CoO6 octahedra that share corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(5)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. Both Co(3)-O(8) bond lengths are 2.21 Å. There are two shorter (2.11 Å) and two longer (2.44 Å) Co(3)-O(5) bond lengths. In the fourth Co site, Co(4) is bonded to two equivalent O(4) and four equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(5)O6 octahedra. Both Co(4)-O(4) bond lengths are 2.09 Å. All Co(4)-O(6) bond lengths are 2.27 Å. In the fifth Co site, Co(5) is bonded to two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(3)O6 octahedra,  an edgeedge with one Co(5)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Both Co(5)-O(4) bond lengths are 2.22 Å. Both Co(5)-O(6) bond lengths are 2.08 Å. Both Co(5)-O(8) bond lengths are 2.31 Å. Si(1) is bonded to one O(3), one O(4), and two equivalent O(7) atoms to form SiO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with four equivalent Co(2)O4 tetrahedra, and corners with two equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 61-62°. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.67 Å. Both Si(1)-O(7) bond lengths are 1.65 Å. Sb(1) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(4)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and edges with three equivalent Co(3)O6 octahedra. Both Sb(1)-O(5) bond lengths are 2.08 Å. Both Sb(1)-O(6) bond lengths are 2.06 Å. Both Sb(1)-O(8) bond lengths are 2.02 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Co(2), and two equivalent Co(1) atoms to form OYCo3 tetrahedra that share  a cornercorner with one O(6)Co3Sb tetrahedra,  a cornercorner with one O(5)YCo2Sb tetrahedra, corners with three equivalent O(2)Y3Co tetrahedra,  an edgeedge with one O(2)Y3Co tetrahedra, and  an edgeedge with one O(1)YCo3 tetrahedra. In the second O site, O(2) is bonded to three equivalent Y(1) and one Co(1) atom to form distorted OY3Co tetrahedra that share corners with two equivalent O(2)Y3Co tetrahedra, corners with three equivalent O(5)YCo2Sb tetrahedra, corners with three equivalent O(1)YCo3 tetrahedra,  an edgeedge with one O(1)YCo3 tetrahedra, and edges with two equivalent O(2)Y3Co tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one Si(1) atom. In the fourth O site, O(4) is bonded to one Co(4), two equivalent Co(5), and one Si(1) atom to form distorted OCo3Si tetrahedra that share  a cornercorner with one O(4)Co3Si tetrahedra, corners with four equivalent O(6)Co3Sb tetrahedra,  an edgeedge with one O(4)Co3Si tetrahedra, and edges with two equivalent O(6)Co3Sb tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), two equivalent Co(3), and one Sb(1) atom to form distorted OYCo2Sb tetrahedra that share  a cornercorner with one O(1)YCo3 tetrahedra, corners with two equivalent O(6)Co3Sb tetrahedra, corners with three equivalent O(2)Y3Co tetrahedra, corners with three equivalent O(5)YCo2Sb tetrahedra, and edges with two equivalent O(5)YCo2Sb tetrahedra. In the sixth O site, O(6) is bonded to one Co(2), one Co(4), one Co(5), and one Sb(1) atom to form distorted OCo3Sb tetrahedra that share  a cornercorner with one O(1)YCo3 tetrahedra, corners with two equivalent O(4)Co3Si tetrahedra, corners with two equivalent O(5)YCo2Sb tetrahedra, corners with three equivalent O(6)Co3Sb tetrahedra,  an edgeedge with one O(6)Co3Sb tetrahedra, and  an edgeedge with one O(4)Co3Si tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), one Co(3), one Co(5), and one Sb(1) atom.