Nb10Ge7 crystallizes in the trigonal P-3m1 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Ge(1), one Ge(5), and four equivalent Ge(3) atoms. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(4), two equivalent Ge(1), and three equivalent Ge(2) atoms. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one Ge(3), one Ge(4), two equivalent Ge(1), and two equivalent Ge(2) atoms. In the fourth Nb site, Nb(4) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the fifth Nb site, Nb(5) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Nb(3), two equivalent Nb(4), two equivalent Nb(5), and three equivalent Nb(2) atoms. In the second Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Nb(3), two equivalent Nb(4), two equivalent Nb(5), and four equivalent Nb(1) atoms. In the third Ge site, Ge(4) is bonded in an octahedral geometry to three equivalent Nb(2) and three equivalent Nb(3) atoms. In the fourth Ge site, Ge(5) is bonded in an octahedral geometry to six equivalent Nb(1) atoms. In the fifth Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), and two equivalent Nb(5) atoms.
Nb10Ge7 crystallizes in the trigonal P-3m1 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Ge(1), one Ge(5), and four equivalent Ge(3) atoms. The Nb(1)-Ge(1) bond length is 2.72 Å. The Nb(1)-Ge(5) bond length is 2.53 Å. There are a spread of Nb(1)-Ge(3) bond distances ranging from 2.70-3.04 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(4), two equivalent Ge(1), and three equivalent Ge(2) atoms. The Nb(2)-Ge(4) bond length is 2.53 Å. Both Nb(2)-Ge(1) bond lengths are 2.70 Å. There are a spread of Nb(2)-Ge(2) bond distances ranging from 2.73-3.05 Å. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one Ge(3), one Ge(4), two equivalent Ge(1), and two equivalent Ge(2) atoms. The Nb(3)-Ge(3) bond length is 2.71 Å. The Nb(3)-Ge(4) bond length is 2.53 Å. There is one shorter (2.84 Å) and one longer (2.98 Å) Nb(3)-Ge(1) bond length. Both Nb(3)-Ge(2) bond lengths are 2.70 Å. In the fourth Nb site, Nb(4) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. Both Nb(4)-Ge(1) bond lengths are 2.77 Å. Both Nb(4)-Ge(2) bond lengths are 2.75 Å. Both Nb(4)-Ge(3) bond lengths are 2.80 Å. In the fifth Nb site, Nb(5) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. Both Nb(5)-Ge(1) bond lengths are 2.78 Å. Both Nb(5)-Ge(2) bond lengths are 2.79 Å. Both Nb(5)-Ge(3) bond lengths are 2.76 Å. There are five inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Nb(3), two equivalent Nb(4), two equivalent Nb(5), and three equivalent Nb(2) atoms. In the second Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Nb(3), two equivalent Nb(4), two equivalent Nb(5), and four equivalent Nb(1) atoms. In the third Ge site, Ge(4) is bonded in an octahedral geometry to three equivalent Nb(2) and three equivalent Nb(3) atoms. In the fourth Ge site, Ge(5) is bonded in an octahedral geometry to six equivalent Nb(1) atoms. In the fifth Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), and two equivalent Nb(5) atoms.