Tb11Ge10 is delta Molybdenum Boride-like structured and crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one Ge(1), one Ge(2), one Ge(4), and four equivalent Ge(5) atoms. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to one Ge(3), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(5) atoms. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to four equivalent Ge(3) and four equivalent Ge(5) atoms. In the fourth Tb site, Tb(4) is bonded in a 7-coordinate geometry to one Ge(4), two equivalent Ge(1), two equivalent Ge(3), and two equivalent Ge(5) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), and four equivalent Tb(4) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Tb(2) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(3), four equivalent Tb(4), and two equivalent Ge(3) atoms. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Tb(4) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to one Tb(2), one Tb(3), two equivalent Tb(4), four equivalent Tb(1), and one Ge(5) atom.
Tb11Ge10 is delta Molybdenum Boride-like structured and crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one Ge(1), one Ge(2), one Ge(4), and four equivalent Ge(5) atoms. The Tb(1)-Ge(1) bond length is 3.37 Å. The Tb(1)-Ge(2) bond length is 3.05 Å. The Tb(1)-Ge(4) bond length is 2.89 Å. There are two shorter (3.17 Å) and two longer (3.21 Å) Tb(1)-Ge(5) bond lengths. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to one Ge(3), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(5) atoms. The Tb(2)-Ge(3) bond length is 3.15 Å. Both Tb(2)-Ge(1) bond lengths are 2.81 Å. Both Tb(2)-Ge(2) bond lengths are 3.33 Å. Both Tb(2)-Ge(5) bond lengths are 3.48 Å. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to four equivalent Ge(3) and four equivalent Ge(5) atoms. All Tb(3)-Ge(3) bond lengths are 3.23 Å. All Tb(3)-Ge(5) bond lengths are 3.28 Å. In the fourth Tb site, Tb(4) is bonded in a 7-coordinate geometry to one Ge(4), two equivalent Ge(1), two equivalent Ge(3), and two equivalent Ge(5) atoms. The Tb(4)-Ge(4) bond length is 3.12 Å. Both Tb(4)-Ge(1) bond lengths are 2.99 Å. Both Tb(4)-Ge(3) bond lengths are 3.10 Å. Both Tb(4)-Ge(5) bond lengths are 2.93 Å. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), and four equivalent Tb(4) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Tb(2) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(3), four equivalent Tb(4), and two equivalent Ge(3) atoms. Both Ge(3)-Ge(3) bond lengths are 2.62 Å. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Tb(4) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to one Tb(2), one Tb(3), two equivalent Tb(4), four equivalent Tb(1), and one Ge(5) atom. The Ge(5)-Ge(5) bond length is 2.58 Å.