Hf6Co16Ge7 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Co(1), four equivalent Co(2), and four equivalent Ge(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), one Ge(2), and three equivalent Ge(1) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a body-centered cubic geometry to eight equivalent Co(1) atoms. In the second Ge site, Ge(1) is bonded to four equivalent Hf(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of face and corner-sharing GeHf4Co8 cuboctahedra.
Hf6Co16Ge7 crystallizes in the cubic Fm-3m space group. Hf(1) is bonded in a 12-coordinate geometry to four equivalent Co(1), four equivalent Co(2), and four equivalent Ge(1) atoms. All Hf(1)-Co(1) bond lengths are 2.79 Å. All Hf(1)-Co(2) bond lengths are 2.77 Å. All Hf(1)-Ge(1) bond lengths are 2.90 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), one Ge(2), and three equivalent Ge(1) atoms. All Co(1)-Co(1) bond lengths are 2.75 Å. All Co(1)-Co(2) bond lengths are 2.52 Å. The Co(1)-Ge(2) bond length is 2.38 Å. All Co(1)-Ge(1) bond lengths are 2.50 Å. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Hf(1), three equivalent Co(1), three equivalent Co(2), and three equivalent Ge(1) atoms. All Co(2)-Co(2) bond lengths are 2.58 Å. All Co(2)-Ge(1) bond lengths are 2.33 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a body-centered cubic geometry to eight equivalent Co(1) atoms. In the second Ge site, Ge(1) is bonded to four equivalent Hf(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of face and corner-sharing GeHf4Co8 cuboctahedra.