Rh7B3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. In the second Rh site, Rh(1) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. In the third Rh site, Rh(3) is bonded in a distorted water-like geometry to two equivalent B(1) atoms. B(1) is bonded in a 6-coordinate geometry to one Rh(1), two equivalent Rh(3), and three equivalent Rh(2) atoms.
Rh7B3 crystallizes in the hexagonal P6_3mc space group. There are three inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. There is one shorter (2.08 Å) and two longer (2.21 Å) Rh(2)-B(1) bond lengths. In the second Rh site, Rh(1) is bonded in a 3-coordinate geometry to three equivalent B(1) atoms. All Rh(1)-B(1) bond lengths are 2.21 Å. In the third Rh site, Rh(3) is bonded in a distorted water-like geometry to two equivalent B(1) atoms. Both Rh(3)-B(1) bond lengths are 2.12 Å. B(1) is bonded in a 6-coordinate geometry to one Rh(1), two equivalent Rh(3), and three equivalent Rh(2) atoms.