Li7Ge2 crystallizes in the orthorhombic Cmmm space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to one Li(3), one Ge(1), and two equivalent Ge(2) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. In the third Li site, Li(3) is bonded in a 8-coordinate geometry to four equivalent Li(1) and four equivalent Li(4) atoms. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to two equivalent Li(3), two equivalent Ge(1), and two equivalent Ge(2) atoms. In the fifth Li site, Li(5) is bonded in a 2-coordinate geometry to two equivalent Ge(1) and two equivalent Ge(2) atoms. In the sixth Li site, Li(6) is bonded in a 1-coordinate geometry to two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted body-centered cubic geometry to two equivalent Li(1), two equivalent Li(2), two equivalent Li(4), and two equivalent Li(5) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to two equivalent Li(4), two equivalent Li(5), four equivalent Li(1), and four equivalent Li(6) atoms.
Li7Ge2 crystallizes in the orthorhombic Cmmm space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 3-coordinate geometry to one Li(3), one Ge(1), and two equivalent Ge(2) atoms. The Li(1)-Li(3) bond length is 2.52 Å. The Li(1)-Ge(1) bond length is 2.69 Å. Both Li(1)-Ge(2) bond lengths are 2.67 Å. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. All Li(2)-Ge(1) bond lengths are 2.63 Å. In the third Li site, Li(3) is bonded in a 8-coordinate geometry to four equivalent Li(1) and four equivalent Li(4) atoms. All Li(3)-Li(4) bond lengths are 2.66 Å. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to two equivalent Li(3), two equivalent Ge(1), and two equivalent Ge(2) atoms. Both Li(4)-Ge(1) bond lengths are 2.80 Å. Both Li(4)-Ge(2) bond lengths are 2.77 Å. In the fifth Li site, Li(5) is bonded in a 2-coordinate geometry to two equivalent Ge(1) and two equivalent Ge(2) atoms. Both Li(5)-Ge(1) bond lengths are 2.66 Å. Both Li(5)-Ge(2) bond lengths are 2.94 Å. In the sixth Li site, Li(6) is bonded in a 1-coordinate geometry to two equivalent Ge(2) atoms. There is one shorter (2.68 Å) and one longer (2.89 Å) Li(6)-Ge(2) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted body-centered cubic geometry to two equivalent Li(1), two equivalent Li(2), two equivalent Li(4), and two equivalent Li(5) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to two equivalent Li(4), two equivalent Li(5), four equivalent Li(1), and four equivalent Li(6) atoms.