InTbGe2O7 crystallizes in the monoclinic C2 space group. Tb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted InO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra and corners with three equivalent Ge(2)O4 tetrahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-57°. In the second Ge site, Ge(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form GeO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Ge(1) atoms. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Ge(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom.
InTbGe2O7 crystallizes in the monoclinic C2 space group. Tb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. The Tb(1)-O(1) bond length is 2.26 Å. The Tb(1)-O(2) bond length is 2.26 Å. The Tb(1)-O(3) bond length is 2.25 Å. The Tb(1)-O(4) bond length is 2.43 Å. The Tb(1)-O(7) bond length is 2.41 Å. The Tb(1)-O(8) bond length is 2.25 Å. In(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted InO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra and corners with three equivalent Ge(2)O4 tetrahedra. The In(1)-O(1) bond length is 2.24 Å. The In(1)-O(2) bond length is 2.25 Å. The In(1)-O(3) bond length is 2.18 Å. The In(1)-O(4) bond length is 2.19 Å. The In(1)-O(7) bond length is 2.18 Å. The In(1)-O(8) bond length is 2.17 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form GeO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-57°. The Ge(1)-O(1) bond length is 1.76 Å. The Ge(1)-O(3) bond length is 1.78 Å. The Ge(1)-O(5) bond length is 1.78 Å. The Ge(1)-O(7) bond length is 1.77 Å. In the second Ge site, Ge(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form GeO4 tetrahedra that share corners with three equivalent In(1)O6 octahedra and  a cornercorner with one Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-56°. The Ge(2)-O(2) bond length is 1.76 Å. The Ge(2)-O(4) bond length is 1.77 Å. The Ge(2)-O(6) bond length is 1.79 Å. The Ge(2)-O(8) bond length is 1.77 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Ge(1) atoms. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Ge(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Tb(1), one In(1), and one Ge(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Tb(1), one In(1), and one Ge(2) atom.