Ir8Cd41 crystallizes in the trigonal R-3 space group. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 10-coordinate geometry to one Cd(1), three equivalent Cd(5), three equivalent Cd(8), and three equivalent Cd(9) atoms. In the second Ir site, Ir(1) is bonded in a 10-coordinate geometry to one Cd(3), one Cd(5), one Cd(8), one Cd(9), two equivalent Cd(4), two equivalent Cd(6), and two equivalent Cd(7) atoms. There are nine inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 8-coordinate geometry to two equivalent Ir(2) and six equivalent Cd(5) atoms. In the second Cd site, Cd(2) is bonded in a cuboctahedral geometry to six equivalent Cd(7) and six equivalent Cd(9) atoms. In the third Cd site, Cd(3) is bonded in a distorted linear geometry to two equivalent Ir(1) atoms. In the fourth Cd site, Cd(9) is bonded in a distorted bent 150 degrees geometry to one Ir(1), one Ir(2), and one Cd(2) atom. In the fifth Cd site, Cd(4) is bonded in a distorted linear geometry to two equivalent Ir(1) atoms. In the sixth Cd site, Cd(5) is bonded in a distorted linear geometry to one Ir(1), one Ir(2), and one Cd(1) atom. In the seventh Cd site, Cd(6) is bonded in a 2-coordinate geometry to two equivalent Ir(1) atoms. In the eighth Cd site, Cd(7) is bonded in a distorted bent 150 degrees geometry to two equivalent Ir(1) and one Cd(2) atom. In the ninth Cd site, Cd(8) is bonded in a distorted linear geometry to one Ir(1) and one Ir(2) atom.
Ir8Cd41 crystallizes in the trigonal R-3 space group. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 10-coordinate geometry to one Cd(1), three equivalent Cd(5), three equivalent Cd(8), and three equivalent Cd(9) atoms. The Ir(2)-Cd(1) bond length is 3.10 Å. All Ir(2)-Cd(5) bond lengths are 2.70 Å. All Ir(2)-Cd(8) bond lengths are 2.78 Å. All Ir(2)-Cd(9) bond lengths are 2.95 Å. In the second Ir site, Ir(1) is bonded in a 10-coordinate geometry to one Cd(3), one Cd(5), one Cd(8), one Cd(9), two equivalent Cd(4), two equivalent Cd(6), and two equivalent Cd(7) atoms. The Ir(1)-Cd(3) bond length is 2.77 Å. The Ir(1)-Cd(5) bond length is 2.74 Å. The Ir(1)-Cd(8) bond length is 2.80 Å. The Ir(1)-Cd(9) bond length is 2.93 Å. Both Ir(1)-Cd(4) bond lengths are 2.73 Å. There is one shorter (2.74 Å) and one longer (2.79 Å) Ir(1)-Cd(6) bond length. There is one shorter (2.85 Å) and one longer (2.88 Å) Ir(1)-Cd(7) bond length. There are nine inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 8-coordinate geometry to two equivalent Ir(2) and six equivalent Cd(5) atoms. All Cd(1)-Cd(5) bond lengths are 3.04 Å. In the second Cd site, Cd(2) is bonded in a cuboctahedral geometry to six equivalent Cd(7) and six equivalent Cd(9) atoms. All Cd(2)-Cd(7) bond lengths are 3.12 Å. All Cd(2)-Cd(9) bond lengths are 3.13 Å. In the third Cd site, Cd(3) is bonded in a distorted linear geometry to two equivalent Ir(1) atoms. In the fourth Cd site, Cd(9) is bonded in a distorted bent 150 degrees geometry to one Ir(1), one Ir(2), and one Cd(2) atom. In the fifth Cd site, Cd(4) is bonded in a distorted linear geometry to two equivalent Ir(1) atoms. In the sixth Cd site, Cd(5) is bonded in a distorted linear geometry to one Ir(1), one Ir(2), and one Cd(1) atom. In the seventh Cd site, Cd(6) is bonded in a 2-coordinate geometry to two equivalent Ir(1) atoms. In the eighth Cd site, Cd(7) is bonded in a distorted bent 150 degrees geometry to two equivalent Ir(1) and one Cd(2) atom. In the ninth Cd site, Cd(8) is bonded in a distorted linear geometry to one Ir(1) and one Ir(2) atom.