Tm3(RhGe)2 crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 9-coordinate geometry to four equivalent Rh(1), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Tm site, Tm(2) is bonded in a 8-coordinate geometry to four equivalent Rh(1), two equivalent Ge(1), and three equivalent Ge(2) atoms. Rh(1) is bonded in a 9-coordinate geometry to two equivalent Tm(1), four equivalent Tm(2), one Ge(1), and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1), four equivalent Tm(2), and two equivalent Rh(1) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to two equivalent Tm(1), six equivalent Tm(2), and four equivalent Rh(1) atoms.
Tm3(RhGe)2 crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 9-coordinate geometry to four equivalent Rh(1), two equivalent Ge(2), and three equivalent Ge(1) atoms. There are two shorter (2.99 Å) and two longer (3.02 Å) Tm(1)-Rh(1) bond lengths. Both Tm(1)-Ge(2) bond lengths are 3.28 Å. There are a spread of Tm(1)-Ge(1) bond distances ranging from 2.96-3.10 Å. In the second Tm site, Tm(2) is bonded in a 8-coordinate geometry to four equivalent Rh(1), two equivalent Ge(1), and three equivalent Ge(2) atoms. There are a spread of Tm(2)-Rh(1) bond distances ranging from 2.87-3.10 Å. There is one shorter (2.96 Å) and one longer (2.98 Å) Tm(2)-Ge(1) bond length. There are a spread of Tm(2)-Ge(2) bond distances ranging from 3.20-3.33 Å. Rh(1) is bonded in a 9-coordinate geometry to two equivalent Tm(1), four equivalent Tm(2), one Ge(1), and two equivalent Ge(2) atoms. The Rh(1)-Ge(1) bond length is 2.53 Å. There is one shorter (2.57 Å) and one longer (2.59 Å) Rh(1)-Ge(2) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1), four equivalent Tm(2), and two equivalent Rh(1) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to two equivalent Tm(1), six equivalent Tm(2), and four equivalent Rh(1) atoms.