Ca11Ga7 crystallizes in the cubic Fm-3m space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted octahedral geometry to six equivalent Ga(1) atoms. In the second Ca site, Ca(2) is bonded in a cuboctahedral geometry to twelve equivalent Ca(4) atoms. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to three equivalent Ga(1) and three equivalent Ga(2) atoms. In the fourth Ca site, Ca(4) is bonded in a distorted square co-planar geometry to one Ca(2), two equivalent Ga(1), and two equivalent Ga(2) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ca(1), four equivalent Ca(3), and four equivalent Ca(4) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to three equivalent Ca(3), three equivalent Ca(4), and three equivalent Ga(2) atoms.
Ca11Ga7 crystallizes in the cubic Fm-3m space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a distorted octahedral geometry to six equivalent Ga(1) atoms. All Ca(1)-Ga(1) bond lengths are 3.53 Å. In the second Ca site, Ca(2) is bonded in a cuboctahedral geometry to twelve equivalent Ca(4) atoms. All Ca(2)-Ca(4) bond lengths are 3.81 Å. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to three equivalent Ga(1) and three equivalent Ga(2) atoms. All Ca(3)-Ga(1) bond lengths are 3.28 Å. All Ca(3)-Ga(2) bond lengths are 3.19 Å. In the fourth Ca site, Ca(4) is bonded in a distorted square co-planar geometry to one Ca(2), two equivalent Ga(1), and two equivalent Ga(2) atoms. Both Ca(4)-Ga(1) bond lengths are 3.24 Å. Both Ca(4)-Ga(2) bond lengths are 3.11 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ca(1), four equivalent Ca(3), and four equivalent Ca(4) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to three equivalent Ca(3), three equivalent Ca(4), and three equivalent Ga(2) atoms. All Ga(2)-Ga(2) bond lengths are 2.66 Å.