Nb10(SnGe)3 crystallizes in the orthorhombic Fmm2 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Sn(1), three equivalent Sn(2), and two equivalent Ge(1) atoms. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to three equivalent Sn(2), one Ge(2), and two equivalent Ge(1) atoms. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one Sn(1), one Sn(2), 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 one Sn(2), two equivalent Sn(1), one Ge(2), and two equivalent Ge(1) atoms. In the fifth Nb site, Nb(5) is bonded in a 6-coordinate geometry to two equivalent Nb(5), one Sn(1), two equivalent Sn(2), and one Ge(2) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to two equivalent Nb(1), two equivalent Nb(3), two equivalent Nb(5), and four equivalent Nb(4) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Nb(3), one Nb(4), two equivalent Nb(5), three equivalent Nb(1), and three equivalent Nb(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), and two equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Nb(2), two equivalent Nb(4), two equivalent Nb(5), and four equivalent Nb(3) atoms.
Nb10(SnGe)3 crystallizes in the orthorhombic Fmm2 space group. There are five inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 6-coordinate geometry to one Sn(1), three equivalent Sn(2), and two equivalent Ge(1) atoms. The Nb(1)-Sn(1) bond length is 2.78 Å. There is one shorter (2.80 Å) and two longer (3.05 Å) Nb(1)-Sn(2) bond lengths. Both Nb(1)-Ge(1) bond lengths are 2.75 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to three equivalent Sn(2), one Ge(2), and two equivalent Ge(1) atoms. There is one shorter (2.89 Å) and two longer (3.07 Å) Nb(2)-Sn(2) bond lengths. The Nb(2)-Ge(2) bond length is 2.72 Å. Both Nb(2)-Ge(1) bond lengths are 2.76 Å. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one Sn(1), one Sn(2), two equivalent Ge(1), and two equivalent Ge(2) atoms. The Nb(3)-Sn(1) bond length is 2.80 Å. The Nb(3)-Sn(2) bond length is 2.83 Å. Both Nb(3)-Ge(1) bond lengths are 2.79 Å. Both Nb(3)-Ge(2) bond lengths are 3.04 Å. In the fourth Nb site, Nb(4) is bonded in a 6-coordinate geometry to one Sn(2), two equivalent Sn(1), one Ge(2), and two equivalent Ge(1) atoms. The Nb(4)-Sn(2) bond length is 2.87 Å. Both Nb(4)-Sn(1) bond lengths are 3.05 Å. The Nb(4)-Ge(2) bond length is 2.71 Å. Both Nb(4)-Ge(1) bond lengths are 2.77 Å. In the fifth Nb site, Nb(5) is bonded in a 6-coordinate geometry to two equivalent Nb(5), one Sn(1), two equivalent Sn(2), and one Ge(2) atom. There is one shorter (2.61 Å) and one longer (2.63 Å) Nb(5)-Nb(5) bond length. The Nb(5)-Sn(1) bond length is 2.87 Å. Both Nb(5)-Sn(2) bond lengths are 2.87 Å. The Nb(5)-Ge(2) bond length is 2.74 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 10-coordinate geometry to two equivalent Nb(1), two equivalent Nb(3), two equivalent Nb(5), and four equivalent Nb(4) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to one Nb(3), one Nb(4), two equivalent Nb(5), three equivalent Nb(1), and three equivalent Nb(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Nb(1), two equivalent Nb(2), two equivalent Nb(3), two equivalent Nb(4), and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 2.62 Å. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Nb(2), two equivalent Nb(4), two equivalent Nb(5), and four equivalent Nb(3) atoms.