Nb6Co16Ge7 crystallizes in the cubic Fm-3m space group. Nb(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 Nb(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 Nb(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 Nb(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of distorted corner and face-sharing GeNb4Co8 cuboctahedra.
Nb6Co16Ge7 crystallizes in the cubic Fm-3m space group. Nb(1) is bonded in a 12-coordinate geometry to four equivalent Co(1), four equivalent Co(2), and four equivalent Ge(1) atoms. All Nb(1)-Co(1) bond lengths are 2.77 Å. All Nb(1)-Co(2) bond lengths are 2.71 Å. All Nb(1)-Ge(1) bond lengths are 2.88 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 13-coordinate geometry to three equivalent Nb(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 2.71 Å. All Co(1)-Co(2) bond lengths are 2.53 Å. The Co(1)-Ge(2) bond length is 2.35 Å. All Co(1)-Ge(1) bond lengths are 2.49 Å. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to three equivalent Nb(1), three equivalent Co(1), three equivalent Co(2), and three equivalent Ge(1) atoms. All Co(2)-Co(2) bond lengths are 2.64 Å. All Co(2)-Ge(1) bond lengths are 2.31 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 Nb(1), four equivalent Co(1), and four equivalent Co(2) atoms to form a mixture of distorted corner and face-sharing GeNb4Co8 cuboctahedra.