Nd2RuRh3Si4 crystallizes in the tetragonal P-4m2 space group. Nd(1) is bonded in a 16-coordinate geometry to two equivalent Ru(1), two equivalent Rh(1), two equivalent Rh(2), two equivalent Rh(3), four equivalent Si(1), and four equivalent Si(2) atoms. Ru(1) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Si(1) atoms. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Nd(1) and four equivalent Si(2) atoms to form a mixture of distorted edge and face-sharing RhNd4Si4 tetrahedra. In the second Rh site, Rh(2) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Si(1) atoms. In the third Rh site, Rh(3) is bonded to four equivalent Nd(1) and four equivalent Si(2) atoms to form a mixture of distorted edge and face-sharing RhNd4Si4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to four equivalent Nd(1), two equivalent Ru(1), two equivalent Rh(2), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Nd(1), two equivalent Rh(1), two equivalent Rh(3), and one Si(1) atom.
Nd2RuRh3Si4 crystallizes in the tetragonal P-4m2 space group. Nd(1) is bonded in a 16-coordinate geometry to two equivalent Ru(1), two equivalent Rh(1), two equivalent Rh(2), two equivalent Rh(3), four equivalent Si(1), and four equivalent Si(2) atoms. Both Nd(1)-Ru(1) bond lengths are 3.25 Å. Both Nd(1)-Rh(1) bond lengths are 3.29 Å. Both Nd(1)-Rh(2) bond lengths are 3.25 Å. Both Nd(1)-Rh(3) bond lengths are 3.29 Å. All Nd(1)-Si(1) bond lengths are 3.20 Å. All Nd(1)-Si(2) bond lengths are 3.20 Å. Ru(1) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Si(1) atoms. All Ru(1)-Si(1) bond lengths are 2.39 Å. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Nd(1) and four equivalent Si(2) atoms to form a mixture of distorted edge and face-sharing RhNd4Si4 tetrahedra. All Rh(1)-Si(2) bond lengths are 2.42 Å. In the second Rh site, Rh(2) is bonded in a 4-coordinate geometry to four equivalent Nd(1) and four equivalent Si(1) atoms. All Rh(2)-Si(1) bond lengths are 2.39 Å. In the third Rh site, Rh(3) is bonded to four equivalent Nd(1) and four equivalent Si(2) atoms to form a mixture of distorted edge and face-sharing RhNd4Si4 tetrahedra. All Rh(3)-Si(2) bond lengths are 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 Nd(1), two equivalent Ru(1), two equivalent Rh(2), and one Si(2) atom. The Si(1)-Si(2) bond length is 2.60 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Nd(1), two equivalent Rh(1), two equivalent Rh(3), and one Si(1) atom.