Sr11Ga4Sn3 crystallizes in the cubic Fm-3m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent Ga(1) and three equivalent Sn(1) atoms. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to one Sr(3), two equivalent Ga(1), and two equivalent Sn(1) atoms. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(2) atoms. In the fourth Sr site, Sr(4) is bonded in an octahedral geometry to six equivalent Sn(1) atoms. Ga(1) is bonded in a 9-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), and three equivalent Ga(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) atoms.
Sr11Ga4Sn3 crystallizes in the cubic Fm-3m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent Ga(1) and three equivalent Sn(1) atoms. All Sr(1)-Ga(1) bond lengths are 3.41 Å. All Sr(1)-Sn(1) bond lengths are 3.53 Å. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to one Sr(3), two equivalent Ga(1), and two equivalent Sn(1) atoms. The Sr(2)-Sr(3) bond length is 4.10 Å. Both Sr(2)-Ga(1) bond lengths are 3.42 Å. Both Sr(2)-Sn(1) bond lengths are 3.52 Å. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(2) atoms. In the fourth Sr site, Sr(4) is bonded in an octahedral geometry to six equivalent Sn(1) atoms. All Sr(4)-Sn(1) bond lengths are 3.75 Å. Ga(1) is bonded in a 9-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), and three equivalent Ga(1) atoms. All Ga(1)-Ga(1) bond lengths are 2.76 Å. Sn(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) atoms.