Y3RhSi3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to two equivalent Si(1) and five equivalent Si(3) atoms. In the second Y site, Y(2) is bonded in a 10-coordinate geometry to four equivalent Rh(1), two equivalent Si(1), and four equivalent Si(2) atoms. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to two equivalent Rh(1), one Si(2), two equivalent Si(3), and three equivalent Si(1) atoms. Rh(1) is bonded in a 10-coordinate geometry to two equivalent Y(3), four equivalent Y(2), one Si(1), and three equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), three equivalent Y(3), one Rh(1), and one Si(3) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Y(3), four equivalent Y(2), three equivalent Rh(1), and one Si(2) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Y(3), five equivalent Y(1), one Si(1), and one Si(3) atom.
Y3RhSi3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to two equivalent Si(1) and five equivalent Si(3) atoms. Both Y(1)-Si(1) bond lengths are 3.02 Å. There are a spread of Y(1)-Si(3) bond distances ranging from 2.95-3.12 Å. In the second Y site, Y(2) is bonded in a 10-coordinate geometry to four equivalent Rh(1), two equivalent Si(1), and four equivalent Si(2) atoms. There are a spread of Y(2)-Rh(1) bond distances ranging from 3.00-3.15 Å. Both Y(2)-Si(1) bond lengths are 2.91 Å. There are two shorter (3.02 Å) and two longer (3.10 Å) Y(2)-Si(2) bond lengths. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to two equivalent Rh(1), one Si(2), two equivalent Si(3), and three equivalent Si(1) atoms. Both Y(3)-Rh(1) bond lengths are 3.30 Å. The Y(3)-Si(2) bond length is 2.91 Å. Both Y(3)-Si(3) bond lengths are 2.93 Å. There are two shorter (2.99 Å) and one longer (3.18 Å) Y(3)-Si(1) bond length. Rh(1) is bonded in a 10-coordinate geometry to two equivalent Y(3), four equivalent Y(2), one Si(1), and three equivalent Si(2) atoms. The Rh(1)-Si(1) bond length is 2.59 Å. There are two shorter (2.43 Å) and one longer (2.45 Å) Rh(1)-Si(2) bond length. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), two equivalent Y(2), three equivalent Y(3), one Rh(1), and one Si(3) atom. The Si(1)-Si(3) bond length is 2.52 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Y(3), four equivalent Y(2), three equivalent Rh(1), and one Si(2) atom. The Si(2)-Si(2) bond length is 2.61 Å. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Y(3), five equivalent Y(1), one Si(1), and one Si(3) atom. The Si(3)-Si(3) bond length is 2.54 Å.