Sm5Pb4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one Pb(3), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted edge, corner, and face-sharing SmPb6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 39-41°. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Pb(2), two equivalent Pb(3), and three equivalent Pb(1) atoms. In the third Sm site, Sm(3) is bonded to two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms to form a mixture of corner and face-sharing SmPb6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. There are three inequivalent Pb sites. In the first Pb site, Pb(3) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Sm(3), and four equivalent Sm(2) atoms. In the second Pb site, Pb(1) is bonded in a 7-coordinate geometry to one Sm(3), three equivalent Sm(1), and three equivalent Sm(2) atoms. In the third Pb site, Pb(2) is bonded in a 8-coordinate geometry to two equivalent Sm(2), two equivalent Sm(3), and four equivalent Sm(1) atoms.
Sm5Pb4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one Pb(3), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted edge, corner, and face-sharing SmPb6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 39-41°. The Sm(1)-Pb(3) bond length is 3.33 Å. There is one shorter (3.23 Å) and one longer (3.31 Å) Sm(1)-Pb(2) bond length. There are a spread of Sm(1)-Pb(1) bond distances ranging from 3.16-3.27 Å. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Pb(2), two equivalent Pb(3), and three equivalent Pb(1) atoms. The Sm(2)-Pb(2) bond length is 3.47 Å. There is one shorter (3.21 Å) and one longer (3.50 Å) Sm(2)-Pb(3) bond length. There are a spread of Sm(2)-Pb(1) bond distances ranging from 3.27-3.50 Å. In the third Sm site, Sm(3) is bonded to two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms to form a mixture of corner and face-sharing SmPb6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. Both Sm(3)-Pb(1) bond lengths are 3.29 Å. There is one shorter (3.20 Å) and one longer (3.33 Å) Sm(3)-Pb(2) bond length. There is one shorter (3.20 Å) and one longer (3.32 Å) Sm(3)-Pb(3) bond length. There are three inequivalent Pb sites. In the first Pb site, Pb(3) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Sm(3), and four equivalent Sm(2) atoms. In the second Pb site, Pb(1) is bonded in a 7-coordinate geometry to one Sm(3), three equivalent Sm(1), and three equivalent Sm(2) atoms. In the third Pb site, Pb(2) is bonded in a 8-coordinate geometry to two equivalent Sm(2), two equivalent Sm(3), and four equivalent Sm(1) atoms.