Ba(IrSi)2 is alpha Pu-derived structured and crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 15-coordinate geometry to three equivalent Ir(2), four equivalent Ir(1), four equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Si(1), and three equivalent Si(2) atoms. In the second Ir site, Ir(2) is bonded in a 7-coordinate geometry to three equivalent Ba(1), one Si(2), and three equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Ir(1), and three equivalent Ir(2) atoms. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Ir(2), and three equivalent Ir(1) atoms.
Ba(IrSi)2 is alpha Pu-derived structured and crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 15-coordinate geometry to three equivalent Ir(2), four equivalent Ir(1), four equivalent Si(1), and four equivalent Si(2) atoms. There are a spread of Ba(1)-Ir(2) bond distances ranging from 3.26-3.50 Å. There are a spread of Ba(1)-Ir(1) bond distances ranging from 3.52-3.75 Å. There are a spread of Ba(1)-Si(1) bond distances ranging from 3.36-3.72 Å. There are a spread of Ba(1)-Si(2) bond distances ranging from 3.40-3.82 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Si(1), and three equivalent Si(2) atoms. The Ir(1)-Si(1) bond length is 2.42 Å. There are a spread of Ir(1)-Si(2) bond distances ranging from 2.32-2.38 Å. In the second Ir site, Ir(2) is bonded in a 7-coordinate geometry to three equivalent Ba(1), one Si(2), and three equivalent Si(1) atoms. The Ir(2)-Si(2) bond length is 2.37 Å. There are a spread of Ir(2)-Si(1) bond distances ranging from 2.37-2.42 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Ir(1), and three equivalent Ir(2) atoms. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Ba(1), one Ir(2), and three equivalent Ir(1) atoms.