Y2RhSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to four equivalent Rh(1), two equivalent Si(2), and four equivalent Si(1) atoms. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to two equivalent Rh(1), one Si(1), and five equivalent Si(2) atoms. Rh(1) is bonded in a 4-coordinate geometry to two equivalent Y(2), four equivalent Y(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 9-coordinate geometry to one Y(2), four equivalent Y(1), three equivalent Rh(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), five equivalent Y(2), one Rh(1), and one Si(2) atom.
Y2RhSi2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to four equivalent Rh(1), two equivalent Si(2), and four equivalent Si(1) atoms. There are a spread of Y(1)-Rh(1) bond distances ranging from 3.00-3.17 Å. Both Y(1)-Si(2) bond lengths are 2.90 Å. There are two shorter (3.02 Å) and two longer (3.08 Å) Y(1)-Si(1) bond lengths. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to two equivalent Rh(1), one Si(1), and five equivalent Si(2) atoms. Both Y(2)-Rh(1) bond lengths are 3.32 Å. The Y(2)-Si(1) bond length is 2.92 Å. There are a spread of Y(2)-Si(2) bond distances ranging from 3.00-3.19 Å. Rh(1) is bonded in a 4-coordinate geometry to two equivalent Y(2), four equivalent Y(1), one Si(2), and three equivalent Si(1) atoms. The Rh(1)-Si(2) bond length is 2.57 Å. There are two shorter (2.42 Å) and one longer (2.45 Å) Rh(1)-Si(1) bond length. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to one Y(2), four equivalent Y(1), three equivalent Rh(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.65 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), five equivalent Y(2), one Rh(1), and one Si(2) atom. The Si(2)-Si(2) bond length is 2.54 Å.