Rh4Pb5 crystallizes in the orthorhombic Fmmm space group. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 10-coordinate geometry to four equivalent Rh(3), two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms. In the second Rh site, Rh(2) is bonded in a 10-coordinate geometry to two equivalent Rh(2), four equivalent Pb(2), and four equivalent Pb(4) atoms. In the third Rh site, Rh(3) is bonded in a 10-coordinate geometry to two equivalent Rh(1), two equivalent Rh(3), two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms. There are four inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent Rh(1) and four equivalent Rh(3) atoms. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one Rh(1), two equivalent Rh(2), and two equivalent Rh(3) atoms. In the third Pb site, Pb(3) is bonded to two equivalent Rh(1), four equivalent Rh(3), and one Pb(4) atom to form corner-sharing PbRh6Pb hexagonal pyramids. In the fourth Pb site, Pb(4) is bonded in a 5-coordinate geometry to four equivalent Rh(2) and one Pb(3) atom.
Rh4Pb5 crystallizes in the orthorhombic Fmmm space group. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 10-coordinate geometry to four equivalent Rh(3), two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms. All Rh(1)-Rh(3) bond lengths are 2.87 Å. Both Rh(1)-Pb(1) bond lengths are 2.78 Å. Both Rh(1)-Pb(2) bond lengths are 2.75 Å. Both Rh(1)-Pb(3) bond lengths are 2.89 Å. In the second Rh site, Rh(2) is bonded in a 10-coordinate geometry to two equivalent Rh(2), four equivalent Pb(2), and four equivalent Pb(4) atoms. Both Rh(2)-Rh(2) bond lengths are 2.89 Å. All Rh(2)-Pb(2) bond lengths are 2.79 Å. All Rh(2)-Pb(4) bond lengths are 3.02 Å. In the third Rh site, Rh(3) is bonded in a 10-coordinate geometry to two equivalent Rh(1), two equivalent Rh(3), two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms. Both Rh(3)-Rh(3) bond lengths are 2.89 Å. Both Rh(3)-Pb(1) bond lengths are 2.75 Å. Both Rh(3)-Pb(2) bond lengths are 2.81 Å. Both Rh(3)-Pb(3) bond lengths are 2.87 Å. There are four inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent Rh(1) and four equivalent Rh(3) atoms. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one Rh(1), two equivalent Rh(2), and two equivalent Rh(3) atoms. In the third Pb site, Pb(3) is bonded to two equivalent Rh(1), four equivalent Rh(3), and one Pb(4) atom to form corner-sharing PbRh6Pb hexagonal pyramids. The Pb(3)-Pb(4) bond length is 3.37 Å. In the fourth Pb site, Pb(4) is bonded in a 5-coordinate geometry to four equivalent Rh(2) and one Pb(3) atom.