Nb10Ge7 crystallizes in the trigonal P-31m space group. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Ge(2) and five equivalent Ge(1) atoms. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to two equivalent Nb(3) and six equivalent Ge(1) atoms. In the third Nb site, Nb(3) is bonded in a 8-coordinate geometry to two equivalent Nb(2) and six equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Nb(2), two equivalent Nb(3), and five equivalent Nb(1) atoms. In the second Ge site, Ge(2) is bonded in an octahedral geometry to six equivalent Nb(1) atoms.
Nb10Ge7 crystallizes in the trigonal P-31m space group. There are three inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Ge(2) and five equivalent Ge(1) atoms. The Nb(1)-Ge(2) bond length is 2.54 Å. There are a spread of Nb(1)-Ge(1) bond distances ranging from 2.71-2.97 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to two equivalent Nb(3) and six equivalent Ge(1) atoms. Both Nb(2)-Nb(3) bond lengths are 2.72 Å. All Nb(2)-Ge(1) bond lengths are 2.76 Å. In the third Nb site, Nb(3) is bonded in a 8-coordinate geometry to two equivalent Nb(2) and six equivalent Ge(1) atoms. All Nb(3)-Ge(1) bond lengths are 2.79 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Nb(2), two equivalent Nb(3), and five equivalent Nb(1) atoms. In the second Ge site, Ge(2) is bonded in an octahedral geometry to six equivalent Nb(1) atoms.