NdRhSi2 crystallizes in the orthorhombic Cmcm space group. Nd(1) is bonded in a 14-coordinate geometry to four equivalent Rh(1), four equivalent Si(2), and six equivalent Si(1) atoms. Rh(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted single-bond geometry to six equivalent Nd(1), one Rh(1), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Rh(1) atoms.
NdRhSi2 crystallizes in the orthorhombic Cmcm space group. Nd(1) is bonded in a 14-coordinate geometry to four equivalent Rh(1), four equivalent Si(2), and six equivalent Si(1) atoms. All Nd(1)-Rh(1) bond lengths are 3.26 Å. There are two shorter (3.23 Å) and two longer (3.24 Å) Nd(1)-Si(2) bond lengths. There are four shorter (3.19 Å) and two longer (3.21 Å) Nd(1)-Si(1) bond lengths. Rh(1) is bonded in a 5-coordinate geometry to four equivalent Nd(1), one Si(1), and four equivalent Si(2) atoms. The Rh(1)-Si(1) bond length is 2.36 Å. There are two shorter (2.41 Å) and two longer (2.43 Å) Rh(1)-Si(2) bond lengths. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted single-bond geometry to six equivalent Nd(1), one Rh(1), and two equivalent Si(1) atoms. Both Si(1)-Si(1) bond lengths are 2.48 Å. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Rh(1) atoms.