LaRh3Si2 crystallizes in the orthorhombic Imma space group. La(1) is bonded in a 20-coordinate geometry to two equivalent La(1), four equivalent Rh(2), eight equivalent Rh(1), and six equivalent Si(1) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 6-coordinate geometry to four equivalent La(1) and four equivalent Si(1) atoms. In the second Rh site, Rh(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 6-coordinate geometry to three equivalent La(1), two equivalent Rh(2), and four equivalent Rh(1) atoms.
LaRh3Si2 crystallizes in the orthorhombic Imma space group. La(1) is bonded in a 20-coordinate geometry to two equivalent La(1), four equivalent Rh(2), eight equivalent Rh(1), and six equivalent Si(1) atoms. Both La(1)-La(1) bond lengths are 3.60 Å. There are two shorter (3.14 Å) and two longer (3.53 Å) La(1)-Rh(2) bond lengths. There are four shorter (3.13 Å) and four longer (3.58 Å) La(1)-Rh(1) bond lengths. There are a spread of La(1)-Si(1) bond distances ranging from 3.22-3.34 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 6-coordinate geometry to four equivalent La(1) and four equivalent Si(1) atoms. All Rh(2)-Si(1) bond lengths are 2.48 Å. In the second Rh site, Rh(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and four equivalent Si(1) atoms. There are two shorter (2.42 Å) and two longer (2.44 Å) Rh(1)-Si(1) bond lengths. Si(1) is bonded in a 6-coordinate geometry to three equivalent La(1), two equivalent Rh(2), and four equivalent Rh(1) atoms.