Sc11Nb3O24 crystallizes in the triclinic P1 space group. There are eleven inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 7-coordinate geometry to one O(18), one O(2), one O(20), one O(22), one O(4), one O(7), and one O(9) atom. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one O(2), one O(22), one O(24), one O(3), one O(5), and one O(6) atom. In the third Sc site, Sc(3) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(17), one O(3), one O(4), one O(7), and one O(8) atom. In the fourth Sc site, Sc(4) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(13), one O(20), one O(5), one O(6), and one O(9) atom. In the fifth Sc site, Sc(5) is bonded in a 7-coordinate geometry to one O(10), one O(14), one O(16), one O(19), one O(21), one O(6), and one O(8) atom. In the sixth Sc site, Sc(6) is bonded in a 6-coordinate geometry to one O(10), one O(13), one O(14), one O(15), one O(17), and one O(18) atom. In the seventh Sc site, Sc(7) is bonded in a 7-coordinate geometry to one O(11), one O(15), one O(17), one O(19), one O(4), one O(6), and one O(9) atom. In the eighth Sc site, Sc(8) is bonded in a 6-coordinate geometry to one O(15), one O(16), one O(19), one O(20), one O(24), and one O(5) atom. In the ninth Sc site, Sc(9) is bonded in a 6-coordinate geometry to one O(12), one O(17), one O(18), one O(21), one O(22), and one O(8) atom. In the tenth Sc site, Sc(10) is bonded in a 6-coordinate geometry to one O(1), one O(19), one O(20), one O(22), one O(23), and one O(3) atom. In the eleventh Sc site, Sc(11) is bonded in a 7-coordinate geometry to one O(16), one O(18), one O(21), one O(23), one O(3), one O(5), and one O(7) atom. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in an octahedral geometry to one O(1), one O(11), one O(14), one O(21), one O(24), and one O(4) atom. In the second Nb site, Nb(2) is bonded in an octahedral geometry to one O(12), one O(13), one O(16), one O(2), one O(23), and one O(9) atom. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(7), and one O(8) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sc(10), one Sc(3), one Sc(4), and one Nb(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sc(1), one Sc(2), and one Nb(2) atom. In the third O site, O(3) is bonded to one Sc(10), one Sc(11), one Sc(2), and one Sc(3) atom to form OSc4 tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra,  an edgeedge with one O(5)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sc(1), one Sc(3), one Sc(7), and one Nb(1) atom. In the fifth O site, O(5) is bonded to one Sc(11), one Sc(2), one Sc(4), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(20)Sc4 tetrahedra,  an edgeedge with one O(3)Sc4 tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the sixth O site, O(6) is bonded to one Sc(2), one Sc(4), one Sc(5), and one Sc(7) atom to form OSc4 tetrahedra that share  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(19)Sc4 tetrahedra, and  an edgeedge with one O(5)Sc4 tetrahedra. In the seventh O site, O(7) is bonded to one Sc(1), one Sc(11), one Sc(3), and one Nb(3) atom to form distorted OSc3Nb trigonal pyramids that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra,  an edgeedge with one O(18)Sc4 tetrahedra, and  an edgeedge with one O(3)Sc4 tetrahedra. In the eighth O site, O(8) is bonded to one Sc(3), one Sc(5), one Sc(9), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sc(1), one Sc(4), one Sc(7), and one Nb(2) atom. In the tenth O site, O(10) is bonded to one Sc(4), one Sc(5), one Sc(6), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sc(7), one Nb(1), and one Nb(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sc(9), one Nb(2), and one Nb(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sc(3), one Sc(4), one Sc(6), and one Nb(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sc(5), one Sc(6), and one Nb(1) atom. In the fifteenth O site, O(15) is bonded to one Sc(6), one Sc(7), one Sc(8), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra, and  an edgeedge with one O(19)Sc4 tetrahedra. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sc(11), one Sc(5), one Sc(8), and one Nb(2) atom. In the seventeenth O site, O(17) is bonded to one Sc(3), one Sc(6), one Sc(7), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra, and  an edgeedge with one O(18)Sc4 tetrahedra. In the eighteenth O site, O(18) is bonded to one Sc(1), one Sc(11), one Sc(6), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the nineteenth O site, O(19) is bonded to one Sc(10), one Sc(5), one Sc(7), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(20)Sc4 tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the twentieth O site, O(20) is bonded to one Sc(1), one Sc(10), one Sc(4), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(19)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra, and  an edgeedge with one O(5)Sc4 tetrahedra. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Sc(11), one Sc(5), one Sc(9), and one Nb(1) atom. In the twenty-second O site, O(22) is bonded to one Sc(1), one Sc(10), one Sc(2), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(18)Sc4 tetrahedra,  an edgeedge with one O(20)Sc4 tetrahedra, and  an edgeedge with one O(3)Sc4 tetrahedra. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Sc(10), one Sc(11), and one Nb(2) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Sc(2), one Sc(8), and one Nb(1) atom.
Sc11Nb3O24 crystallizes in the triclinic P1 space group. There are eleven inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 7-coordinate geometry to one O(18), one O(2), one O(20), one O(22), one O(4), one O(7), and one O(9) atom. The Sc(1)-O(18) bond length is 2.14 Å. The Sc(1)-O(2) bond length is 2.17 Å. The Sc(1)-O(20) bond length is 2.03 Å. The Sc(1)-O(22) bond length is 2.17 Å. The Sc(1)-O(4) bond length is 2.15 Å. The Sc(1)-O(7) bond length is 2.17 Å. The Sc(1)-O(9) bond length is 2.60 Å. In the second Sc site, Sc(2) is bonded in a 6-coordinate geometry to one O(2), one O(22), one O(24), one O(3), one O(5), and one O(6) atom. The Sc(2)-O(2) bond length is 2.16 Å. The Sc(2)-O(22) bond length is 2.12 Å. The Sc(2)-O(24) bond length is 2.16 Å. The Sc(2)-O(3) bond length is 2.10 Å. The Sc(2)-O(5) bond length is 2.17 Å. The Sc(2)-O(6) bond length is 2.06 Å. In the third Sc site, Sc(3) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(17), one O(3), one O(4), one O(7), and one O(8) atom. The Sc(3)-O(1) bond length is 2.53 Å. The Sc(3)-O(13) bond length is 2.14 Å. The Sc(3)-O(17) bond length is 2.13 Å. The Sc(3)-O(3) bond length is 2.03 Å. The Sc(3)-O(4) bond length is 2.12 Å. The Sc(3)-O(7) bond length is 2.29 Å. The Sc(3)-O(8) bond length is 2.19 Å. In the fourth Sc site, Sc(4) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(13), one O(20), one O(5), one O(6), and one O(9) atom. The Sc(4)-O(1) bond length is 2.15 Å. The Sc(4)-O(10) bond length is 2.11 Å. The Sc(4)-O(13) bond length is 2.66 Å. The Sc(4)-O(20) bond length is 2.08 Å. The Sc(4)-O(5) bond length is 2.09 Å. The Sc(4)-O(6) bond length is 2.19 Å. The Sc(4)-O(9) bond length is 2.19 Å. In the fifth Sc site, Sc(5) is bonded in a 7-coordinate geometry to one O(10), one O(14), one O(16), one O(19), one O(21), one O(6), and one O(8) atom. The Sc(5)-O(10) bond length is 2.28 Å. The Sc(5)-O(14) bond length is 2.17 Å. The Sc(5)-O(16) bond length is 2.11 Å. The Sc(5)-O(19) bond length is 2.10 Å. The Sc(5)-O(21) bond length is 2.57 Å. The Sc(5)-O(6) bond length is 2.11 Å. The Sc(5)-O(8) bond length is 2.10 Å. In the sixth Sc site, Sc(6) is bonded in a 6-coordinate geometry to one O(10), one O(13), one O(14), one O(15), one O(17), and one O(18) atom. The Sc(6)-O(10) bond length is 2.18 Å. The Sc(6)-O(13) bond length is 2.16 Å. The Sc(6)-O(14) bond length is 2.13 Å. The Sc(6)-O(15) bond length is 2.12 Å. The Sc(6)-O(17) bond length is 2.14 Å. The Sc(6)-O(18) bond length is 2.03 Å. In the seventh Sc site, Sc(7) is bonded in a 7-coordinate geometry to one O(11), one O(15), one O(17), one O(19), one O(4), one O(6), and one O(9) atom. The Sc(7)-O(11) bond length is 2.22 Å. The Sc(7)-O(15) bond length is 2.24 Å. The Sc(7)-O(17) bond length is 2.06 Å. The Sc(7)-O(19) bond length is 2.12 Å. The Sc(7)-O(4) bond length is 2.61 Å. The Sc(7)-O(6) bond length is 2.11 Å. The Sc(7)-O(9) bond length is 2.13 Å. In the eighth Sc site, Sc(8) is bonded in a 6-coordinate geometry to one O(15), one O(16), one O(19), one O(20), one O(24), and one O(5) atom. The Sc(8)-O(15) bond length is 2.07 Å. The Sc(8)-O(16) bond length is 2.18 Å. The Sc(8)-O(19) bond length is 2.16 Å. The Sc(8)-O(20) bond length is 2.10 Å. The Sc(8)-O(24) bond length is 2.16 Å. The Sc(8)-O(5) bond length is 2.09 Å. In the ninth Sc site, Sc(9) is bonded in a 6-coordinate geometry to one O(12), one O(17), one O(18), one O(21), one O(22), and one O(8) atom. The Sc(9)-O(12) bond length is 2.19 Å. The Sc(9)-O(17) bond length is 2.12 Å. The Sc(9)-O(18) bond length is 2.18 Å. The Sc(9)-O(21) bond length is 2.15 Å. The Sc(9)-O(22) bond length is 2.03 Å. The Sc(9)-O(8) bond length is 2.17 Å. In the tenth Sc site, Sc(10) is bonded in a 6-coordinate geometry to one O(1), one O(19), one O(20), one O(22), one O(23), and one O(3) atom. The Sc(10)-O(1) bond length is 2.17 Å. The Sc(10)-O(19) bond length is 2.06 Å. The Sc(10)-O(20) bond length is 2.18 Å. The Sc(10)-O(22) bond length is 2.12 Å. The Sc(10)-O(23) bond length is 2.11 Å. The Sc(10)-O(3) bond length is 2.13 Å. In the eleventh Sc site, Sc(11) is bonded in a 7-coordinate geometry to one O(16), one O(18), one O(21), one O(23), one O(3), one O(5), and one O(7) atom. The Sc(11)-O(16) bond length is 2.49 Å. The Sc(11)-O(18) bond length is 2.12 Å. The Sc(11)-O(21) bond length is 2.14 Å. The Sc(11)-O(23) bond length is 2.15 Å. The Sc(11)-O(3) bond length is 2.19 Å. The Sc(11)-O(5) bond length is 2.04 Å. The Sc(11)-O(7) bond length is 2.24 Å. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in an octahedral geometry to one O(1), one O(11), one O(14), one O(21), one O(24), and one O(4) atom. The Nb(1)-O(1) bond length is 2.01 Å. The Nb(1)-O(11) bond length is 2.07 Å. The Nb(1)-O(14) bond length is 1.97 Å. The Nb(1)-O(21) bond length is 2.00 Å. The Nb(1)-O(24) bond length is 1.99 Å. The Nb(1)-O(4) bond length is 2.01 Å. In the second Nb site, Nb(2) is bonded in an octahedral geometry to one O(12), one O(13), one O(16), one O(2), one O(23), and one O(9) atom. The Nb(2)-O(12) bond length is 2.15 Å. The Nb(2)-O(13) bond length is 1.95 Å. The Nb(2)-O(16) bond length is 2.01 Å. The Nb(2)-O(2) bond length is 2.00 Å. The Nb(2)-O(23) bond length is 1.96 Å. The Nb(2)-O(9) bond length is 1.97 Å. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(7), and one O(8) atom. The Nb(3)-O(10) bond length is 2.01 Å. The Nb(3)-O(11) bond length is 2.05 Å. The Nb(3)-O(12) bond length is 2.00 Å. The Nb(3)-O(15) bond length is 2.08 Å. The Nb(3)-O(7) bond length is 1.96 Å. The Nb(3)-O(8) bond length is 2.11 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sc(10), one Sc(3), one Sc(4), and one Nb(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sc(1), one Sc(2), and one Nb(2) atom. In the third O site, O(3) is bonded to one Sc(10), one Sc(11), one Sc(2), and one Sc(3) atom to form OSc4 tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra,  an edgeedge with one O(5)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sc(1), one Sc(3), one Sc(7), and one Nb(1) atom. In the fifth O site, O(5) is bonded to one Sc(11), one Sc(2), one Sc(4), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(20)Sc4 tetrahedra,  an edgeedge with one O(3)Sc4 tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the sixth O site, O(6) is bonded to one Sc(2), one Sc(4), one Sc(5), and one Sc(7) atom to form OSc4 tetrahedra that share  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(19)Sc4 tetrahedra, and  an edgeedge with one O(5)Sc4 tetrahedra. In the seventh O site, O(7) is bonded to one Sc(1), one Sc(11), one Sc(3), and one Nb(3) atom to form distorted OSc3Nb trigonal pyramids that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra,  an edgeedge with one O(18)Sc4 tetrahedra, and  an edgeedge with one O(3)Sc4 tetrahedra. In the eighth O site, O(8) is bonded to one Sc(3), one Sc(5), one Sc(9), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sc(1), one Sc(4), one Sc(7), and one Nb(2) atom. In the tenth O site, O(10) is bonded to one Sc(4), one Sc(5), one Sc(6), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sc(7), one Nb(1), and one Nb(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sc(9), one Nb(2), and one Nb(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sc(3), one Sc(4), one Sc(6), and one Nb(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sc(5), one Sc(6), and one Nb(1) atom. In the fifteenth O site, O(15) is bonded to one Sc(6), one Sc(7), one Sc(8), and one Nb(3) atom to form OSc3Nb tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(10)Sc3Nb tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra, and  an edgeedge with one O(19)Sc4 tetrahedra. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sc(11), one Sc(5), one Sc(8), and one Nb(2) atom. In the seventeenth O site, O(17) is bonded to one Sc(3), one Sc(6), one Sc(7), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(8)Sc3Nb tetrahedra, and  an edgeedge with one O(18)Sc4 tetrahedra. In the eighteenth O site, O(18) is bonded to one Sc(1), one Sc(11), one Sc(6), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(20)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(17)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra, and  an edgeedge with one O(7)Sc3Nb trigonal pyramid. In the nineteenth O site, O(19) is bonded to one Sc(10), one Sc(5), one Sc(7), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(22)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  an edgeedge with one O(15)Sc3Nb tetrahedra,  an edgeedge with one O(20)Sc4 tetrahedra, and  an edgeedge with one O(6)Sc4 tetrahedra. In the twentieth O site, O(20) is bonded to one Sc(1), one Sc(10), one Sc(4), and one Sc(8) atom to form OSc4 tetrahedra that share  a cornercorner with one O(10)Sc3Nb tetrahedra,  a cornercorner with one O(15)Sc3Nb tetrahedra,  a cornercorner with one O(18)Sc4 tetrahedra,  a cornercorner with one O(3)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(19)Sc4 tetrahedra,  an edgeedge with one O(22)Sc4 tetrahedra, and  an edgeedge with one O(5)Sc4 tetrahedra. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Sc(11), one Sc(5), one Sc(9), and one Nb(1) atom. In the twenty-second O site, O(22) is bonded to one Sc(1), one Sc(10), one Sc(2), and one Sc(9) atom to form OSc4 tetrahedra that share  a cornercorner with one O(8)Sc3Nb tetrahedra,  a cornercorner with one O(17)Sc4 tetrahedra,  a cornercorner with one O(19)Sc4 tetrahedra,  a cornercorner with one O(5)Sc4 tetrahedra,  a cornercorner with one O(6)Sc4 tetrahedra,  a cornercorner with one O(7)Sc3Nb trigonal pyramid,  an edgeedge with one O(18)Sc4 tetrahedra,  an edgeedge with one O(20)Sc4 tetrahedra, and  an edgeedge with one O(3)Sc4 tetrahedra. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Sc(10), one Sc(11), and one Nb(2) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Sc(2), one Sc(8), and one Nb(1) atom.