TbMo2SbO9 crystallizes in the monoclinic C2/c space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(7), and two equivalent O(9) atoms. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second Mo site, Mo(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(4), one O(8), and two equivalent O(9) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Tb(2) and one Mo(1) atom. In the second O site, O(9) is bonded in a distorted trigonal planar geometry to one Tb(1) and two equivalent Sb(1) atoms. In the third O site, O(2) is bonded in a bent 150 degrees geometry to one Tb(1) and one Mo(1) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Tb(2) and one Mo(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Tb(1), one Mo(1), and one Sb(1) atom. In the sixth O site, O(5) is bonded in a linear geometry to one Tb(2) and one Mo(2) atom. In the seventh O site, O(6) is bonded in a bent 150 degrees geometry to one Tb(2) and one Mo(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Tb(1) and one Mo(2) atom. In the ninth O site, O(8) is bonded in a linear geometry to one Mo(2) and one Sb(1) atom.
TbMo2SbO9 crystallizes in the monoclinic C2/c space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(7), and two equivalent O(9) atoms. Both Tb(1)-O(2) bond lengths are 2.34 Å. Both Tb(1)-O(4) bond lengths are 2.39 Å. Both Tb(1)-O(7) bond lengths are 2.46 Å. Both Tb(1)-O(9) bond lengths are 2.39 Å. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. Both Tb(2)-O(1) bond lengths are 2.42 Å. Both Tb(2)-O(3) bond lengths are 2.36 Å. Both Tb(2)-O(5) bond lengths are 2.38 Å. Both Tb(2)-O(6) bond lengths are 2.42 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mo(1)-O(1) bond length is 1.76 Å. The Mo(1)-O(2) bond length is 1.79 Å. The Mo(1)-O(3) bond length is 1.80 Å. The Mo(1)-O(4) bond length is 1.86 Å. In the second Mo site, Mo(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. The Mo(2)-O(5) bond length is 1.78 Å. The Mo(2)-O(6) bond length is 1.77 Å. The Mo(2)-O(7) bond length is 1.79 Å. The Mo(2)-O(8) bond length is 1.85 Å. Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(4), one O(8), and two equivalent O(9) atoms. The Sb(1)-O(4) bond length is 2.31 Å. The Sb(1)-O(8) bond length is 2.01 Å. There is one shorter (2.02 Å) and one longer (2.11 Å) Sb(1)-O(9) bond length. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Tb(2) and one Mo(1) atom. In the second O site, O(9) is bonded in a distorted trigonal planar geometry to one Tb(1) and two equivalent Sb(1) atoms. In the third O site, O(2) is bonded in a bent 150 degrees geometry to one Tb(1) and one Mo(1) atom. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to one Tb(2) and one Mo(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Tb(1), one Mo(1), and one Sb(1) atom. In the sixth O site, O(5) is bonded in a linear geometry to one Tb(2) and one Mo(2) atom. In the seventh O site, O(6) is bonded in a bent 150 degrees geometry to one Tb(2) and one Mo(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Tb(1) and one Mo(2) atom. In the ninth O site, O(8) is bonded in a linear geometry to one Mo(2) and one Sb(1) atom.