Hf3(NbGe2)2 is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 7-coordinate geometry to one Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. Nb(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(1), and three equivalent Ge(2) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), four equivalent Nb(1), and one Ge(3) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Hf(2), four equivalent Hf(1), three equivalent Nb(1), and one Ge(2) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Nb(1), and one Ge(1) atom.
Hf3(NbGe2)2 is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 7-coordinate geometry to one Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. The Hf(1)-Ge(1) bond length is 2.92 Å. There is one shorter (2.83 Å) and one longer (2.94 Å) Hf(1)-Ge(3) bond length. There are a spread of Hf(1)-Ge(2) bond distances ranging from 2.80-3.01 Å. In the second Hf site, Hf(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. There is one shorter (2.71 Å) and one longer (2.79 Å) Hf(2)-Ge(1) bond length. Both Hf(2)-Ge(2) bond lengths are 2.83 Å. Both Hf(2)-Ge(3) bond lengths are 2.71 Å. Nb(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(1), and three equivalent Ge(2) atoms. The Nb(1)-Ge(3) bond length is 2.80 Å. There is one shorter (2.66 Å) and one longer (2.69 Å) Nb(1)-Ge(1) bond length. There are a spread of Nb(1)-Ge(2) bond distances ranging from 2.59-2.78 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Hf(1), two equivalent Hf(2), four equivalent Nb(1), and one Ge(3) atom. The Ge(1)-Ge(3) bond length is 2.58 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Hf(2), four equivalent Hf(1), three equivalent Nb(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.78 Å. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Nb(1), and one Ge(1) atom.