Ir2Zn2B crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), three equivalent Zn(2), and two equivalent B(1) atoms. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Zn(1), four equivalent Zn(3), and two equivalent B(2) atoms. In the third Ir site, Ir(3) is bonded in a 8-coordinate geometry to four equivalent Zn(2) and four equivalent B(1) atoms. In the fourth Ir site, Ir(4) is bonded in a 8-coordinate geometry to two equivalent Zn(1), two equivalent Zn(3), two equivalent B(1), and two equivalent B(2) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Ir(1), two equivalent Ir(2), two equivalent Ir(4), one Zn(3), one Zn(4), three equivalent Zn(1), and one B(1) atom to form a mixture of distorted corner and face-sharing ZnZn5BIr6 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), two equivalent Zn(4), five equivalent Zn(2), and one B(1) atom. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to four equivalent Ir(2), four equivalent Ir(4), two equivalent Zn(1), two equivalent Zn(3), and two equivalent B(2) atoms. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to four equivalent Ir(1), two equivalent Zn(1), and four equivalent Zn(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to two equivalent Ir(1), two equivalent Ir(3), two equivalent Ir(4), one Zn(1), and one Zn(2) atom. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2), four equivalent Ir(4), and two equivalent Zn(3) atoms.
Ir2Zn2B crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 9-coordinate geometry to two equivalent Zn(1), two equivalent Zn(4), three equivalent Zn(2), and two equivalent B(1) atoms. Both Ir(1)-Zn(1) bond lengths are 2.70 Å. Both Ir(1)-Zn(4) bond lengths are 2.65 Å. There is one shorter (2.57 Å) and two longer (2.75 Å) Ir(1)-Zn(2) bond lengths. Both Ir(1)-B(1) bond lengths are 2.14 Å. In the second Ir site, Ir(2) is bonded in a 6-coordinate geometry to four equivalent Zn(1), four equivalent Zn(3), and two equivalent B(2) atoms. All Ir(2)-Zn(1) bond lengths are 2.67 Å. All Ir(2)-Zn(3) bond lengths are 2.96 Å. Both Ir(2)-B(2) bond lengths are 2.13 Å. In the third Ir site, Ir(3) is bonded in a 8-coordinate geometry to four equivalent Zn(2) and four equivalent B(1) atoms. All Ir(3)-Zn(2) bond lengths are 2.68 Å. All Ir(3)-B(1) bond lengths are 2.22 Å. In the fourth Ir site, Ir(4) is bonded in a 8-coordinate geometry to two equivalent Zn(1), two equivalent Zn(3), two equivalent B(1), and two equivalent B(2) atoms. Both Ir(4)-Zn(1) bond lengths are 2.75 Å. Both Ir(4)-Zn(3) bond lengths are 2.67 Å. Both Ir(4)-B(1) bond lengths are 2.21 Å. Both Ir(4)-B(2) bond lengths are 2.21 Å. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Ir(1), two equivalent Ir(2), two equivalent Ir(4), one Zn(3), one Zn(4), three equivalent Zn(1), and one B(1) atom to form a mixture of distorted corner and face-sharing ZnZn5BIr6 cuboctahedra. The Zn(1)-Zn(3) bond length is 2.65 Å. The Zn(1)-Zn(4) bond length is 2.76 Å. There is one shorter (2.66 Å) and two longer (2.82 Å) Zn(1)-Zn(1) bond lengths. The Zn(1)-B(1) bond length is 2.65 Å. In the second Zn site, Zn(2) is bonded in a 13-coordinate geometry to two equivalent Ir(3), three equivalent Ir(1), two equivalent Zn(4), five equivalent Zn(2), and one B(1) atom. Both Zn(2)-Zn(4) bond lengths are 2.93 Å. There are a spread of Zn(2)-Zn(2) bond distances ranging from 2.72-2.84 Å. The Zn(2)-B(1) bond length is 2.66 Å. In the third Zn site, Zn(3) is bonded in a 14-coordinate geometry to four equivalent Ir(2), four equivalent Ir(4), two equivalent Zn(1), two equivalent Zn(3), and two equivalent B(2) atoms. Both Zn(3)-Zn(3) bond lengths are 2.82 Å. Both Zn(3)-B(2) bond lengths are 2.77 Å. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to four equivalent Ir(1), two equivalent Zn(1), and four equivalent Zn(2) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 8-coordinate geometry to two equivalent Ir(1), two equivalent Ir(3), two equivalent Ir(4), one Zn(1), and one Zn(2) atom. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Ir(2), four equivalent Ir(4), and two equivalent Zn(3) atoms.