YbCe9O20 is Fluorite-derived structured and crystallizes in the triclinic P-1 space group. Yb(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent O(8), and two equivalent O(9) atoms. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to one O(3), one O(7), one O(8), one O(9), two equivalent O(1), and two equivalent O(5) atoms. In the second Ce site, Ce(2) is bonded in a body-centered cubic geometry to two equivalent O(4), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. In the third Ce site, Ce(3) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(5), one O(6), one O(8), one O(9), and two equivalent O(2) atoms. In the fourth Ce site, Ce(4) is bonded in a body-centered cubic geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(10), and two equivalent O(3) atoms. In the fifth Ce site, Ce(5) is bonded in a body-centered cubic geometry to one O(10), one O(2), one O(3), one O(4), one O(5), one O(7), and two equivalent O(6) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ce(3), one Ce(4), and two equivalent Ce(1) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(3)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(8)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the second O site, O(2) is bonded to one Yb(1), one Ce(5), and two equivalent Ce(3) atoms to form OYbCe3 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra, corners with two equivalent O(1)Ce4 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra,  an edgeedge with one O(8)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the third O site, O(3) is bonded to one Ce(1), one Ce(5), and two equivalent Ce(4) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(1)Ce4 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra, corners with four equivalent O(7)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the fourth O site, O(4) is bonded to one Yb(1), one Ce(2), one Ce(4), and one Ce(5) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(8)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the fifth O site, O(5) is bonded to one Ce(3), one Ce(5), and two equivalent Ce(1) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(10)Ce4 tetrahedra, corners with three equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(2)YbCe3 tetrahedra, corners with three equivalent O(9)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the sixth O site, O(6) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(5) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(3)Ce4 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the seventh O site, O(7) is bonded to one Ce(1), one Ce(2), one Ce(4), and one Ce(5) atom to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with four equivalent O(3)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the eighth O site, O(8) is bonded to one Yb(1), one Ce(1), one Ce(3), and one Ce(4) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with four equivalent O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the ninth O site, O(9) is bonded to one Yb(1), one Ce(1), one Ce(2), and one Ce(3) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the tenth O site, O(10) is bonded to one Ce(3), one Ce(5), and two equivalent Ce(4) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(5)Ce4 tetrahedra, corners with three equivalent O(3)Ce4 tetrahedra, corners with three equivalent O(6)Ce4 tetrahedra, corners with three equivalent O(4)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra.
YbCe9O20 is Fluorite-derived structured and crystallizes in the triclinic P-1 space group. Yb(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent O(8), and two equivalent O(9) atoms. Both Yb(1)-O(2) bond lengths are 2.41 Å. Both Yb(1)-O(4) bond lengths are 2.41 Å. Both Yb(1)-O(8) bond lengths are 2.41 Å. Both Yb(1)-O(9) bond lengths are 2.41 Å. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to one O(3), one O(7), one O(8), one O(9), two equivalent O(1), and two equivalent O(5) atoms. The Ce(1)-O(3) bond length is 2.37 Å. The Ce(1)-O(7) bond length is 2.37 Å. The Ce(1)-O(8) bond length is 2.33 Å. The Ce(1)-O(9) bond length is 2.33 Å. There is one shorter (2.37 Å) and one longer (2.38 Å) Ce(1)-O(1) bond length. There is one shorter (2.37 Å) and one longer (2.38 Å) Ce(1)-O(5) bond length. In the second Ce site, Ce(2) is bonded in a body-centered cubic geometry to two equivalent O(4), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. Both Ce(2)-O(4) bond lengths are 2.35 Å. Both Ce(2)-O(6) bond lengths are 2.37 Å. Both Ce(2)-O(7) bond lengths are 2.37 Å. Both Ce(2)-O(9) bond lengths are 2.35 Å. In the third Ce site, Ce(3) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(5), one O(6), one O(8), one O(9), and two equivalent O(2) atoms. The Ce(3)-O(1) bond length is 2.39 Å. The Ce(3)-O(10) bond length is 2.37 Å. The Ce(3)-O(5) bond length is 2.39 Å. The Ce(3)-O(6) bond length is 2.37 Å. The Ce(3)-O(8) bond length is 2.35 Å. The Ce(3)-O(9) bond length is 2.35 Å. Both Ce(3)-O(2) bond lengths are 2.34 Å. In the fourth Ce site, Ce(4) is bonded in a body-centered cubic geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(10), and two equivalent O(3) atoms. The Ce(4)-O(1) bond length is 2.37 Å. The Ce(4)-O(4) bond length is 2.33 Å. The Ce(4)-O(7) bond length is 2.37 Å. The Ce(4)-O(8) bond length is 2.33 Å. There is one shorter (2.37 Å) and one longer (2.38 Å) Ce(4)-O(10) bond length. Both Ce(4)-O(3) bond lengths are 2.36 Å. In the fifth Ce site, Ce(5) is bonded in a body-centered cubic geometry to one O(10), one O(2), one O(3), one O(4), one O(5), one O(7), and two equivalent O(6) atoms. The Ce(5)-O(10) bond length is 2.36 Å. The Ce(5)-O(2) bond length is 2.32 Å. The Ce(5)-O(3) bond length is 2.37 Å. The Ce(5)-O(4) bond length is 2.33 Å. The Ce(5)-O(5) bond length is 2.37 Å. The Ce(5)-O(7) bond length is 2.38 Å. Both Ce(5)-O(6) bond lengths are 2.36 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ce(3), one Ce(4), and two equivalent Ce(1) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(3)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(8)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the second O site, O(2) is bonded to one Yb(1), one Ce(5), and two equivalent Ce(3) atoms to form OYbCe3 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra, corners with two equivalent O(1)Ce4 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra,  an edgeedge with one O(8)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the third O site, O(3) is bonded to one Ce(1), one Ce(5), and two equivalent Ce(4) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(1)Ce4 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra, corners with four equivalent O(7)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the fourth O site, O(4) is bonded to one Yb(1), one Ce(2), one Ce(4), and one Ce(5) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(8)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the fifth O site, O(5) is bonded to one Ce(3), one Ce(5), and two equivalent Ce(1) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(10)Ce4 tetrahedra, corners with three equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(2)YbCe3 tetrahedra, corners with three equivalent O(9)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the sixth O site, O(6) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(5) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(3)Ce4 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with three equivalent O(10)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the seventh O site, O(7) is bonded to one Ce(1), one Ce(2), one Ce(4), and one Ce(5) atom to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with four equivalent O(3)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the eighth O site, O(8) is bonded to one Yb(1), one Ce(1), one Ce(3), and one Ce(4) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(5)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(4)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with four equivalent O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(9)YbCe3 tetrahedra. In the ninth O site, O(9) is bonded to one Yb(1), one Ce(1), one Ce(2), and one Ce(3) atom to form OYbCe3 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(10)Ce4 tetrahedra,  a cornercorner with one O(3)Ce4 tetrahedra,  a cornercorner with one O(6)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra, corners with two equivalent O(2)YbCe3 tetrahedra, corners with two equivalent O(4)YbCe3 tetrahedra, corners with two equivalent O(8)YbCe3 tetrahedra, corners with two equivalent O(9)YbCe3 tetrahedra, corners with three equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra,  an edgeedge with one O(4)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra. In the tenth O site, O(10) is bonded to one Ce(3), one Ce(5), and two equivalent Ce(4) atoms to form OCe4 tetrahedra that share  a cornercorner with one O(1)Ce4 tetrahedra,  a cornercorner with one O(7)Ce4 tetrahedra,  a cornercorner with one O(2)YbCe3 tetrahedra,  a cornercorner with one O(8)YbCe3 tetrahedra,  a cornercorner with one O(9)YbCe3 tetrahedra, corners with two equivalent O(5)Ce4 tetrahedra, corners with three equivalent O(3)Ce4 tetrahedra, corners with three equivalent O(6)Ce4 tetrahedra, corners with three equivalent O(4)YbCe3 tetrahedra,  an edgeedge with one O(1)Ce4 tetrahedra,  an edgeedge with one O(10)Ce4 tetrahedra,  an edgeedge with one O(3)Ce4 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra,  an edgeedge with one O(2)YbCe3 tetrahedra, and  an edgeedge with one O(8)YbCe3 tetrahedra.