Tb2Ti3Ge4 crystallizes in the orthorhombic Pnma space group. Tb(1) is bonded in a 7-coordinate geometry to one Ge(3), two equivalent Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms. In the second Ti site, Ti(2) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing TiGe6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Ti(2), four equivalent Ti(1), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Tb(1), one Ti(2), and three equivalent Ti(1) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Tb(1), two equivalent Ti(1), two equivalent Ti(2), and one Ge(3) atom.
Tb2Ti3Ge4 crystallizes in the orthorhombic Pnma space group. Tb(1) is bonded in a 7-coordinate geometry to one Ge(3), two equivalent Ge(2), and four equivalent Ge(1) atoms. The Tb(1)-Ge(3) bond length is 3.03 Å. There is one shorter (2.85 Å) and one longer (3.00 Å) Tb(1)-Ge(2) bond length. There are a spread of Tb(1)-Ge(1) bond distances ranging from 2.88-3.07 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms. The Ti(1)-Ge(2) bond length is 2.73 Å. There is one shorter (2.59 Å) and one longer (2.70 Å) Ti(1)-Ge(3) bond length. There are a spread of Ti(1)-Ge(1) bond distances ranging from 2.62-2.75 Å. In the second Ti site, Ti(2) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing TiGe6 octahedra. The corner-sharing octahedral tilt angles range from 48-52°. Both Ti(2)-Ge(1) bond lengths are 2.81 Å. There is one shorter (2.71 Å) and one longer (2.91 Å) Ti(2)-Ge(2) bond length. There is one shorter (2.72 Å) and one longer (2.74 Å) Ti(2)-Ge(3) bond length. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Ti(2), four equivalent Ti(1), and one Ge(2) atom. The Ge(3)-Ge(2) bond length is 2.66 Å. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Tb(1), one Ti(2), and three equivalent Ti(1) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Tb(1), two equivalent Ti(1), two equivalent Ti(2), and one Ge(3) atom.