NdRh7B4 crystallizes in the orthorhombic Pmm2 space group. Nd(1) is bonded in a 20-coordinate geometry to two equivalent Nd(1), four equivalent Rh(2), four equivalent Rh(3), four equivalent Rh(4), two equivalent B(1), and four equivalent B(2) atoms. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a square co-planar geometry to four equivalent Rh(5) and four equivalent B(1) atoms. In the second Rh site, Rh(2) is bonded in a distorted square co-planar geometry to four equivalent Nd(1) and four equivalent B(2) atoms. In the third Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Nd(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fourth Rh site, Rh(4) is bonded in a distorted square co-planar geometry to two equivalent Nd(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fifth Rh site, Rh(5) is bonded in a 14-coordinate geometry to two equivalent Rh(5), four equivalent Rh(1), four equivalent Rh(3), and four equivalent Rh(4) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Rh(1), two equivalent Rh(3), and two equivalent Rh(4) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Nd(1), two equivalent Rh(2), two equivalent Rh(3), and two equivalent Rh(4) atoms.
NdRh7B4 crystallizes in the orthorhombic Pmm2 space group. Nd(1) is bonded in a 20-coordinate geometry to two equivalent Nd(1), four equivalent Rh(2), four equivalent Rh(3), four equivalent Rh(4), two equivalent B(1), and four equivalent B(2) atoms. Both Nd(1)-Nd(1) bond lengths are 2.92 Å. There are two shorter (3.14 Å) and two longer (3.15 Å) Nd(1)-Rh(2) bond lengths. All Nd(1)-Rh(3) bond lengths are 3.21 Å. All Nd(1)-Rh(4) bond lengths are 3.24 Å. Both Nd(1)-B(1) bond lengths are 3.22 Å. All Nd(1)-B(2) bond lengths are 3.22 Å. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a square co-planar geometry to four equivalent Rh(5) and four equivalent B(1) atoms. There are two shorter (3.12 Å) and two longer (3.17 Å) Rh(1)-Rh(5) bond lengths. All Rh(1)-B(1) bond lengths are 2.17 Å. In the second Rh site, Rh(2) is bonded in a distorted square co-planar geometry to four equivalent Nd(1) and four equivalent B(2) atoms. All Rh(2)-B(2) bond lengths are 2.18 Å. In the third Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Nd(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. Both Rh(3)-Rh(5) bond lengths are 3.09 Å. Both Rh(3)-B(1) bond lengths are 2.17 Å. Both Rh(3)-B(2) bond lengths are 2.18 Å. In the fourth Rh site, Rh(4) is bonded in a distorted square co-planar geometry to two equivalent Nd(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. Both Rh(4)-Rh(5) bond lengths are 3.05 Å. Both Rh(4)-B(1) bond lengths are 2.17 Å. Both Rh(4)-B(2) bond lengths are 2.18 Å. In the fifth Rh site, Rh(5) is bonded in a 14-coordinate geometry to two equivalent Rh(5), four equivalent Rh(1), four equivalent Rh(3), and four equivalent Rh(4) atoms. Both Rh(5)-Rh(5) bond lengths are 2.92 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Rh(1), two equivalent Rh(3), and two equivalent Rh(4) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Nd(1), two equivalent Rh(2), two equivalent Rh(3), and two equivalent Rh(4) atoms.