TbTl(MoO4)2 crystallizes in the orthorhombic Pbcn space group. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Mo(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. Tl(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one Mo(1) atom. In the second O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Tb(1) and one Mo(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Mo(1) and two equivalent Tl(1) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Tb(1) and one Mo(1) atom.
TbTl(MoO4)2 crystallizes in the orthorhombic Pbcn space group. Tb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Both Tb(1)-O(2) bond lengths are 2.31 Å. Both Tb(1)-O(4) bond lengths are 2.29 Å. There are two shorter (2.40 Å) and two longer (2.53 Å) Tb(1)-O(3) bond lengths. 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 1.72 Å. The Mo(1)-O(2) bond length is 1.76 Å. The Mo(1)-O(3) bond length is 1.84 Å. The Mo(1)-O(4) bond length is 1.79 Å. Tl(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. There are two shorter (2.77 Å) and two longer (2.83 Å) Tl(1)-O(1) bond lengths. There are four inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one Mo(1) atom. In the second O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Tb(1) and one Mo(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Mo(1) and two equivalent Tl(1) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Tb(1) and one Mo(1) atom.