Sc2Te5O13 crystallizes in the triclinic P-1 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in an octahedral geometry to one O(11), one O(12), one O(13), one O(3), one O(6), and one O(9) atom. In the second Sc site, Sc(2) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and one O(8) atom. In the second Te site, Te(2) is bonded in a distorted see-saw-like geometry to one O(10), one O(12), one O(5), and one O(7) atom. In the third Te site, Te(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(7), and two equivalent O(9) atoms. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(2), and one O(8) atom. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one O(13), one O(2), one O(5), and two equivalent O(4) atoms. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sc(2), one Te(4), and one Te(5) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sc(1), one Sc(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sc(2) and two equivalent Te(5) atoms. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Te(2) and one Te(5) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Sc(1), one Sc(2), and one Te(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sc(2), one Te(2), and one Te(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sc(1) and two equivalent Te(3) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sc(2), one Te(2), and one Te(4) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Sc(1) and one Te(4) atom. In the twelfth O site, O(12) is bonded in a linear geometry to one Sc(1) and one Te(2) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Sc(1), one Sc(2), and one Te(5) atom.
Sc2Te5O13 crystallizes in the triclinic P-1 space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in an octahedral geometry to one O(11), one O(12), one O(13), one O(3), one O(6), and one O(9) atom. The Sc(1)-O(11) bond length is 2.11 Å. The Sc(1)-O(12) bond length is 2.03 Å. The Sc(1)-O(13) bond length is 2.27 Å. The Sc(1)-O(3) bond length is 2.10 Å. The Sc(1)-O(6) bond length is 2.10 Å. The Sc(1)-O(9) bond length is 2.14 Å. In the second Sc site, Sc(2) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. The Sc(2)-O(10) bond length is 2.17 Å. The Sc(2)-O(13) bond length is 2.23 Å. The Sc(2)-O(2) bond length is 2.10 Å. The Sc(2)-O(3) bond length is 2.41 Å. The Sc(2)-O(4) bond length is 2.18 Å. The Sc(2)-O(6) bond length is 2.24 Å. The Sc(2)-O(7) bond length is 2.18 Å. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and one O(8) atom. The Te(1)-O(1) bond length is 2.07 Å. The Te(1)-O(3) bond length is 1.88 Å. The Te(1)-O(6) bond length is 1.88 Å. The Te(1)-O(8) bond length is 2.07 Å. In the second Te site, Te(2) is bonded in a distorted see-saw-like geometry to one O(10), one O(12), one O(5), and one O(7) atom. The Te(2)-O(10) bond length is 1.89 Å. The Te(2)-O(12) bond length is 1.88 Å. The Te(2)-O(5) bond length is 1.91 Å. The Te(2)-O(7) bond length is 2.46 Å. In the third Te site, Te(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(7), and two equivalent O(9) atoms. The Te(3)-O(1) bond length is 1.92 Å. The Te(3)-O(7) bond length is 1.89 Å. There is one shorter (1.89 Å) and one longer (2.49 Å) Te(3)-O(9) bond length. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(2), and one O(8) atom. The Te(4)-O(10) bond length is 2.58 Å. The Te(4)-O(11) bond length is 1.88 Å. The Te(4)-O(2) bond length is 1.89 Å. The Te(4)-O(8) bond length is 1.93 Å. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one O(13), one O(2), one O(5), and two equivalent O(4) atoms. The Te(5)-O(13) bond length is 1.88 Å. The Te(5)-O(2) bond length is 2.67 Å. The Te(5)-O(5) bond length is 2.08 Å. There is one shorter (1.93 Å) and one longer (2.25 Å) Te(5)-O(4) bond length. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sc(2), one Te(4), and one Te(5) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sc(1), one Sc(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sc(2) and two equivalent Te(5) atoms. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Te(2) and one Te(5) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Sc(1), one Sc(2), and one Te(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sc(2), one Te(2), and one Te(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Te(1) and one Te(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sc(1) and two equivalent Te(3) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sc(2), one Te(2), and one Te(4) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Sc(1) and one Te(4) atom. In the twelfth O site, O(12) is bonded in a linear geometry to one Sc(1) and one Te(2) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Sc(1), one Sc(2), and one Te(5) atom.