HfRhGe2 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 12-coordinate geometry to one Rh(2), three equivalent Rh(1), one Ge(4), one Ge(5), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the second Hf site, Hf(2) is bonded in a 13-coordinate geometry to two equivalent Rh(2), four equivalent Rh(1), two equivalent Ge(1), two equivalent Ge(3), and three equivalent Ge(5) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 12-coordinate geometry to two equivalent Hf(2), three equivalent Hf(1), one Rh(2), one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Rh(1), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Hf(1), three equivalent Hf(2), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), one Rh(2), two equivalent Rh(1), and one Ge(1) atom. In the third Ge site, Ge(2) is bonded in a 7-coordinate geometry to four equivalent Hf(1), two equivalent Rh(1), and one Ge(2) atom. In the fourth Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Rh(1), and one Ge(3) atom. In the fifth Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Rh(1), and two equivalent Rh(2) atoms.
HfRhGe2 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 12-coordinate geometry to one Rh(2), three equivalent Rh(1), one Ge(4), one Ge(5), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. The Hf(1)-Rh(2) bond length is 3.11 Å. There are a spread of Hf(1)-Rh(1) bond distances ranging from 3.08-3.27 Å. The Hf(1)-Ge(4) bond length is 2.78 Å. The Hf(1)-Ge(5) bond length is 2.75 Å. There is one shorter (2.98 Å) and one longer (3.04 Å) Hf(1)-Ge(1) bond length. There is one shorter (2.90 Å) and one longer (2.98 Å) Hf(1)-Ge(2) bond length. There is one shorter (2.86 Å) and one longer (2.89 Å) Hf(1)-Ge(3) bond length. In the second Hf site, Hf(2) is bonded in a 13-coordinate geometry to two equivalent Rh(2), four equivalent Rh(1), two equivalent Ge(1), two equivalent Ge(3), and three equivalent Ge(5) atoms. Both Hf(2)-Rh(2) bond lengths are 3.18 Å. There are two shorter (3.05 Å) and two longer (3.28 Å) Hf(2)-Rh(1) bond lengths. Both Hf(2)-Ge(1) bond lengths are 2.82 Å. Both Hf(2)-Ge(3) bond lengths are 2.85 Å. There are a spread of Hf(2)-Ge(5) bond distances ranging from 2.92-2.99 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 12-coordinate geometry to two equivalent Hf(2), three equivalent Hf(1), one Rh(2), one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms. The Rh(1)-Rh(2) bond length is 2.85 Å. The Rh(1)-Ge(2) bond length is 2.51 Å. The Rh(1)-Ge(3) bond length is 2.51 Å. The Rh(1)-Ge(4) bond length is 2.66 Å. The Rh(1)-Ge(5) bond length is 2.62 Å. There is one shorter (2.51 Å) and one longer (2.61 Å) Rh(1)-Ge(1) bond length. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), two equivalent Rh(1), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms. Both Rh(2)-Ge(1) bond lengths are 2.55 Å. Both Rh(2)-Ge(4) bond lengths are 2.61 Å. Both Rh(2)-Ge(5) bond lengths are 2.58 Å. There are five inequivalent Ge sites. In the first Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Hf(1), three equivalent Hf(2), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), one Rh(2), two equivalent Rh(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.45 Å. In the third Ge site, Ge(2) is bonded in a 7-coordinate geometry to four equivalent Hf(1), two equivalent Rh(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.53 Å. In the fourth Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Rh(1), and one Ge(3) atom. The Ge(3)-Ge(3) bond length is 2.54 Å. In the fifth Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Rh(1), and two equivalent Rh(2) atoms.