Zr4GeSb7 crystallizes in the monoclinic Pm space group. There are four inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 9-coordinate geometry to one Ge(1), one Sb(2), one Sb(5), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(6) atoms. In the second Zr site, Zr(2) is bonded in a 9-coordinate geometry to one Ge(1), one Sb(1), one Sb(5), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(7) atoms. In the third Zr site, Zr(3) is bonded in a 9-coordinate geometry to two equivalent Ge(1), one Sb(4), one Sb(6), one Sb(7), two equivalent Sb(1), and two equivalent Sb(2) atoms. In the fourth Zr site, Zr(4) is bonded in a 9-coordinate geometry to one Sb(3), one Sb(6), one Sb(7), two equivalent Sb(1), two equivalent Sb(2), and two equivalent Sb(5) atoms. Ge(1) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(2), two equivalent Zr(3), two equivalent Sb(4), and two equivalent Sb(6) atoms. There are seven inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Zr(2), two equivalent Zr(3), two equivalent Zr(4), and two equivalent Sb(7) atoms. In the second Sb site, Sb(2) is bonded in a 5-coordinate geometry to one Zr(1), two equivalent Zr(3), and two equivalent Zr(4) atoms. In the third Sb site, Sb(3) is bonded in a 7-coordinate geometry to one Zr(4), two equivalent Zr(1), two equivalent Zr(2), and two equivalent Sb(5) atoms. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Zr(3), two equivalent Zr(1), two equivalent Zr(2), and two equivalent Ge(1) atoms. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(2), two equivalent Zr(4), two equivalent Sb(3), and two equivalent Sb(7) atoms. In the sixth Sb site, Sb(6) is bonded in a 6-coordinate geometry to one Zr(3), one Zr(4), two equivalent Zr(1), and two equivalent Ge(1) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one Zr(3), one Zr(4), two equivalent Zr(2), two equivalent Sb(1), and two equivalent Sb(5) atoms.
Zr4GeSb7 crystallizes in the monoclinic Pm space group. There are four inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 9-coordinate geometry to one Ge(1), one Sb(2), one Sb(5), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(6) atoms. The Zr(1)-Ge(1) bond length is 3.08 Å. The Zr(1)-Sb(2) bond length is 3.18 Å. The Zr(1)-Sb(5) bond length is 2.96 Å. Both Zr(1)-Sb(3) bond lengths are 3.03 Å. Both Zr(1)-Sb(4) bond lengths are 3.11 Å. Both Zr(1)-Sb(6) bond lengths are 2.97 Å. In the second Zr site, Zr(2) is bonded in a 9-coordinate geometry to one Ge(1), one Sb(1), one Sb(5), two equivalent Sb(3), two equivalent Sb(4), and two equivalent Sb(7) atoms. The Zr(2)-Ge(1) bond length is 2.87 Å. The Zr(2)-Sb(1) bond length is 3.32 Å. The Zr(2)-Sb(5) bond length is 3.12 Å. Both Zr(2)-Sb(3) bond lengths are 3.01 Å. Both Zr(2)-Sb(4) bond lengths are 3.03 Å. Both Zr(2)-Sb(7) bond lengths are 3.02 Å. In the third Zr site, Zr(3) is bonded in a 9-coordinate geometry to two equivalent Ge(1), one Sb(4), one Sb(6), one Sb(7), two equivalent Sb(1), and two equivalent Sb(2) atoms. Both Zr(3)-Ge(1) bond lengths are 2.95 Å. The Zr(3)-Sb(4) bond length is 3.11 Å. The Zr(3)-Sb(6) bond length is 2.97 Å. The Zr(3)-Sb(7) bond length is 2.98 Å. Both Zr(3)-Sb(1) bond lengths are 3.05 Å. Both Zr(3)-Sb(2) bond lengths are 3.05 Å. In the fourth Zr site, Zr(4) is bonded in a 9-coordinate geometry to one Sb(3), one Sb(6), one Sb(7), two equivalent Sb(1), two equivalent Sb(2), and two equivalent Sb(5) atoms. The Zr(4)-Sb(3) bond length is 3.30 Å. The Zr(4)-Sb(6) bond length is 3.01 Å. The Zr(4)-Sb(7) bond length is 3.11 Å. Both Zr(4)-Sb(1) bond lengths are 3.03 Å. Both Zr(4)-Sb(2) bond lengths are 3.04 Å. Both Zr(4)-Sb(5) bond lengths are 3.00 Å. Ge(1) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(2), two equivalent Zr(3), two equivalent Sb(4), and two equivalent Sb(6) atoms. Both Ge(1)-Sb(4) bond lengths are 3.03 Å. Both Ge(1)-Sb(6) bond lengths are 2.79 Å. There are seven inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Zr(2), two equivalent Zr(3), two equivalent Zr(4), and two equivalent Sb(7) atoms. Both Sb(1)-Sb(7) bond lengths are 3.12 Å. In the second Sb site, Sb(2) is bonded in a 5-coordinate geometry to one Zr(1), two equivalent Zr(3), and two equivalent Zr(4) atoms. In the third Sb site, Sb(3) is bonded in a 7-coordinate geometry to one Zr(4), two equivalent Zr(1), two equivalent Zr(2), and two equivalent Sb(5) atoms. Both Sb(3)-Sb(5) bond lengths are 3.13 Å. In the fourth Sb site, Sb(4) is bonded in a 7-coordinate geometry to one Zr(3), two equivalent Zr(1), two equivalent Zr(2), and two equivalent Ge(1) atoms. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one Zr(1), one Zr(2), two equivalent Zr(4), two equivalent Sb(3), and two equivalent Sb(7) atoms. Both Sb(5)-Sb(7) bond lengths are 2.92 Å. In the sixth Sb site, Sb(6) is bonded in a 6-coordinate geometry to one Zr(3), one Zr(4), two equivalent Zr(1), and two equivalent Ge(1) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one Zr(3), one Zr(4), two equivalent Zr(2), two equivalent Sb(1), and two equivalent Sb(5) atoms.