Li3Sr4InGe6 crystallizes in the monoclinic Cm space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one Sr(2), two equivalent In(1), one Ge(1), one Ge(6), and two equivalent Ge(2) atoms to form distorted LiSrIn2Ge4 tetrahedra that share corners with three equivalent Li(3)SrGe4 tetrahedra, edges with two equivalent Li(1)SrIn2Ge4 tetrahedra, and  a faceface with one Li(3)SrGe4 tetrahedra. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to two equivalent Sr(2), one In(1), one Ge(2), one Ge(3), and two equivalent Ge(1) atoms. In the third Li site, Li(3) is bonded to one Sr(2), one Ge(1), one Ge(4), and two equivalent Ge(2) atoms to form distorted LiSrGe4 tetrahedra that share corners with two equivalent Li(3)SrGe4 tetrahedra, corners with three equivalent Li(1)SrIn2Ge4 tetrahedra, and  a faceface with one Li(1)SrIn2Ge4 tetrahedra. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one In(1), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(6) atoms. In the second Sr site, Sr(2) is bonded in a 13-coordinate geometry to one Li(1), one Li(3), two equivalent Li(2), two equivalent In(1), one Ge(1), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(5) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to two equivalent In(1), one Ge(1), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), and two equivalent Ge(6) atoms. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to one Ge(2), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), and two equivalent Ge(6) atoms. In(1) is bonded in a 12-coordinate geometry to one Li(2), two equivalent Li(1), one Sr(1), two equivalent Sr(2), two equivalent Sr(3), one Ge(2), one Ge(5), and two equivalent Ge(1) atoms. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Li(1), one Li(3), two equivalent Li(2), one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent In(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(3), one Sr(4), two equivalent Sr(2), and one In(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Sr(2), two equivalent Sr(3), two equivalent Sr(4), one Ge(4), and one Ge(5) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Li(3), two equivalent Sr(1), two equivalent Sr(3), two equivalent Sr(4), one Ge(3), and one Ge(6) atom. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Sr(2), two equivalent Sr(3), two equivalent Sr(4), one In(1), one Ge(3), and one Ge(6) atom. In the sixth Ge site, Ge(6) is bonded in a 9-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(3), two equivalent Sr(4), one Ge(4), and one Ge(5) atom.
Li3Sr4InGe6 crystallizes in the monoclinic Cm space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one Sr(2), two equivalent In(1), one Ge(1), one Ge(6), and two equivalent Ge(2) atoms to form distorted LiSrIn2Ge4 tetrahedra that share corners with three equivalent Li(3)SrGe4 tetrahedra, edges with two equivalent Li(1)SrIn2Ge4 tetrahedra, and  a faceface with one Li(3)SrGe4 tetrahedra. The Li(1)-Sr(2) bond length is 3.40 Å. Both Li(1)-In(1) bond lengths are 3.38 Å. The Li(1)-Ge(1) bond length is 2.93 Å. The Li(1)-Ge(6) bond length is 2.85 Å. Both Li(1)-Ge(2) bond lengths are 2.81 Å. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to two equivalent Sr(2), one In(1), one Ge(2), one Ge(3), and two equivalent Ge(1) atoms. Both Li(2)-Sr(2) bond lengths are 3.20 Å. The Li(2)-In(1) bond length is 2.90 Å. The Li(2)-Ge(2) bond length is 2.82 Å. The Li(2)-Ge(3) bond length is 2.77 Å. Both Li(2)-Ge(1) bond lengths are 2.77 Å. In the third Li site, Li(3) is bonded to one Sr(2), one Ge(1), one Ge(4), and two equivalent Ge(2) atoms to form distorted LiSrGe4 tetrahedra that share corners with two equivalent Li(3)SrGe4 tetrahedra, corners with three equivalent Li(1)SrIn2Ge4 tetrahedra, and  a faceface with one Li(1)SrIn2Ge4 tetrahedra. The Li(3)-Sr(2) bond length is 3.25 Å. The Li(3)-Ge(1) bond length is 2.80 Å. The Li(3)-Ge(4) bond length is 2.81 Å. Both Li(3)-Ge(2) bond lengths are 2.75 Å. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one In(1), two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(6) atoms. The Sr(1)-In(1) bond length is 3.38 Å. Both Sr(1)-Ge(1) bond lengths are 3.38 Å. Both Sr(1)-Ge(4) bond lengths are 3.29 Å. Both Sr(1)-Ge(6) bond lengths are 3.26 Å. In the second Sr site, Sr(2) is bonded in a 13-coordinate geometry to one Li(1), one Li(3), two equivalent Li(2), two equivalent In(1), one Ge(1), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(5) atoms. Both Sr(2)-In(1) bond lengths are 3.39 Å. The Sr(2)-Ge(1) bond length is 3.67 Å. Both Sr(2)-Ge(2) bond lengths are 3.36 Å. Both Sr(2)-Ge(3) bond lengths are 3.27 Å. Both Sr(2)-Ge(5) bond lengths are 3.36 Å. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to two equivalent In(1), one Ge(1), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), and two equivalent Ge(6) atoms. Both Sr(3)-In(1) bond lengths are 3.87 Å. The Sr(3)-Ge(1) bond length is 3.32 Å. Both Sr(3)-Ge(3) bond lengths are 3.33 Å. Both Sr(3)-Ge(4) bond lengths are 3.47 Å. Both Sr(3)-Ge(5) bond lengths are 3.37 Å. Both Sr(3)-Ge(6) bond lengths are 3.45 Å. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to one Ge(2), two equivalent Ge(3), two equivalent Ge(4), two equivalent Ge(5), and two equivalent Ge(6) atoms. The Sr(4)-Ge(2) bond length is 3.29 Å. Both Sr(4)-Ge(3) bond lengths are 3.48 Å. Both Sr(4)-Ge(4) bond lengths are 3.33 Å. Both Sr(4)-Ge(5) bond lengths are 3.43 Å. Both Sr(4)-Ge(6) bond lengths are 3.37 Å. In(1) is bonded in a 12-coordinate geometry to one Li(2), two equivalent Li(1), one Sr(1), two equivalent Sr(2), two equivalent Sr(3), one Ge(2), one Ge(5), and two equivalent Ge(1) atoms. The In(1)-Ge(2) bond length is 2.82 Å. The In(1)-Ge(5) bond length is 2.90 Å. Both In(1)-Ge(1) bond lengths are 2.87 Å. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Li(1), one Li(3), two equivalent Li(2), one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent In(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Li(1), two equivalent Li(3), one Sr(4), two equivalent Sr(2), and one In(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Li(2), two equivalent Sr(2), two equivalent Sr(3), two equivalent Sr(4), one Ge(4), and one Ge(5) atom. The Ge(3)-Ge(4) bond length is 2.52 Å. The Ge(3)-Ge(5) bond length is 2.54 Å. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Li(3), two equivalent Sr(1), two equivalent Sr(3), two equivalent Sr(4), one Ge(3), and one Ge(6) atom. The Ge(4)-Ge(6) bond length is 2.54 Å. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Sr(2), two equivalent Sr(3), two equivalent Sr(4), one In(1), one Ge(3), and one Ge(6) atom. The Ge(5)-Ge(6) bond length is 2.52 Å. In the sixth Ge site, Ge(6) is bonded in a 9-coordinate geometry to one Li(1), two equivalent Sr(1), two equivalent Sr(3), two equivalent Sr(4), one Ge(4), and one Ge(5) atom.