Sr11In3Ga4 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 distorted square co-planar geometry to one Sr(3), two equivalent In(1), and two equivalent Ga(1) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to three equivalent In(1) and three equivalent Ga(1) atoms. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(1) atoms. In the fourth Sr site, Sr(4) is bonded in an octahedral geometry to six equivalent In(1) atoms. In(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) 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.
Sr11In3Ga4 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 distorted square co-planar geometry to one Sr(3), two equivalent In(1), and two equivalent Ga(1) atoms. The Sr(1)-Sr(3) bond length is 4.16 Å. Both Sr(1)-In(1) bond lengths are 3.52 Å. Both Sr(1)-Ga(1) bond lengths are 3.44 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to three equivalent In(1) and three equivalent Ga(1) atoms. All Sr(2)-In(1) bond lengths are 3.60 Å. All Sr(2)-Ga(1) bond lengths are 3.35 Å. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(1) atoms. In the fourth Sr site, Sr(4) is bonded in an octahedral geometry to six equivalent In(1) atoms. All Sr(4)-In(1) bond lengths are 3.81 Å. In(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) 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. All Ga(1)-Ga(1) bond lengths are 2.72 Å.