Ir2Zn11 crystallizes in the cubic I-43m space group. Ir(1) is bonded in a distorted q6 geometry to three equivalent Zn(2), three equivalent Zn(3), and six equivalent Zn(1) atoms. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 2-coordinate geometry to two equivalent Ir(1), one Zn(2), and four equivalent Zn(3) atoms. In the second Zn site, Zn(3) is bonded in a 13-coordinate geometry to two equivalent Ir(1), one Zn(3), two equivalent Zn(2), and eight equivalent Zn(1) atoms. In the third Zn site, Zn(2) is bonded in a 12-coordinate geometry to three equivalent Ir(1), three equivalent Zn(1), three equivalent Zn(2), and three equivalent Zn(3) atoms.
Ir2Zn11 crystallizes in the cubic I-43m space group. Ir(1) is bonded in a distorted q6 geometry to three equivalent Zn(2), three equivalent Zn(3), and six equivalent Zn(1) atoms. All Ir(1)-Zn(2) bond lengths are 2.66 Å. All Ir(1)-Zn(3) bond lengths are 2.76 Å. There are three shorter (2.58 Å) and three longer (2.60 Å) Ir(1)-Zn(1) bond lengths. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 2-coordinate geometry to two equivalent Ir(1), one Zn(2), and four equivalent Zn(3) atoms. The Zn(1)-Zn(2) bond length is 2.66 Å. There are a spread of Zn(1)-Zn(3) bond distances ranging from 2.61-2.96 Å. In the second Zn site, Zn(3) is bonded in a 13-coordinate geometry to two equivalent Ir(1), one Zn(3), two equivalent Zn(2), and eight equivalent Zn(1) atoms. The Zn(3)-Zn(3) bond length is 2.59 Å. Both Zn(3)-Zn(2) bond lengths are 2.64 Å. In the third Zn site, Zn(2) is bonded in a 12-coordinate geometry to three equivalent Ir(1), three equivalent Zn(1), three equivalent Zn(2), and three equivalent Zn(3) atoms. All Zn(2)-Zn(2) bond lengths are 2.70 Å.